Is Saying a Swear Word a Sin in the Bible
The Bible addresses various forms of "swearing," which can refer to making solemn oaths or using profane language. Understanding the biblical perspective requires distinguishing between these two meanings.
In ancient Israel, an oath was a solemn appeal to God, often used to confirm a statement or promise [3]. The practice of making vows to God is mentioned as early as Jacob in Genesis 28:18-22 and was regulated by the Law of Moses [2]. God himself is depicted as taking oaths to show the certainty of his promises or judgments [3, 7]. Similarly, Christ and Paul are also shown taking oaths on fitting occasions [3]. However, the Law also strictly forbade swearing falsely (Leviticus 19:12, Numbers 30:2) and warned against thoughtless oaths (Leviticus 5:4) [5]. Those who swore falsely were considered hateful to God and would face judgment [5].
The New Testament, particularly in the teachings of Jesus and James, introduces a stricter prohibition against swearing. Jesus states, "Swear not at all" (Matthew 5:34), and James echoes this, saying, "But above all things, my brethren, swear not" (James 5:12) [1, 8]. Many interpreters understand these commands to refer to oaths made in everyday conversation, suggesting that believers' words should be trustworthy without needing an oath [3, 8]. John Chrysostom, an early Church Father, remarked that it is "ridiculous" for Christians to still need to learn that it is not right to swear [9].
Beyond solemn oaths, the Bible also condemns profane swearing, which involves the desecration of God's name [1]. The Ten Commandments explicitly forbid taking the Lord's name in vain (Exodus 20:7, Deuteronomy 5:11) [1]. The Psalms speak of the "sin of their mouth" and "the word of their lips" leading to capture in pride, connecting it to oaths and deception [4]. The Bible also links profane speech with other sinful acts such as slander, backbiting, and evil speaking, which are considered abominations to God and stem from an evil heart [6]. The wicked are often described as addicted to such language [1].
Therefore, while solemn oaths were permitted under specific circumstances in the Old Testament, the New Testament emphasizes a general prohibition against swearing in daily life, aiming for a standard where one's "yes" means yes and "no" means no. Profane language, which desecrates God's name or involves falsehood, is consistently condemned as sin throughout Scripture [1, 5].
Sources
- Torrey's Topical Textbook “Torrey's Topical Textbook: Swearing, Profane — Of all kinds is desecration of God's name and is forbidden -- Ex 20:7; Mt 5:34-36; 23:21,22; Jas 5:12. The wicked Addicted to. -- Ps 10:7; Ro 3:14. Love. -- Ps 109:17. Clothe themselves with. -- Ps 109:18. Guilt of -- Ex 20:7; De 5:11. Woe denounced against -- Mt 23:16. Nations visited for -- Jer 23:10; Ho 4:1-3. Punishment for -- Le 24:16,23; Ps 59:12; 109:17,18. Exemplified Son of Israelitish woman. -- Le 24:11. Gehazi. -- 2Ki 5:20. Peter. -- Mt 26:74.”
- Smith's Bible Dictionary “Smith's Bible Dictionary: Vows — A vow is a solemn promise made to God to perform or to abstain from performing a certain thing. The earliest mention of a vow is that of Jacob. (Genesis 28:18-22; 31:13) Vows in general are also mentioned in the book of Job, (Job 22:27) The law therefore did not introduce, but regulated the practice of, vows. Three sorts are mentioned: 1, Vows of devotion; 2, Vows of abstinence; 3, Vows of destruction. + As to vows of devotion, the following rules are laid down: A man might devote to sacred uses possessions or persons, but not the first-born of either man or be”
- Easton's Bible Dictionary “Easton's Bible Dictionary: Oath — A solemn appeal to God, permitted on fitting occasions (Deut. 6:13; Jer. 4:2), in various forms (Gen. 16:5; 2 Sam. 12:5; Ruth 1:17; Hos. 4:15; Rom. 1:9), and taken in different ways (Gen. 14:22; 24:2; 2 Chr. 6:22). God is represented as taking an oath (Heb. 6:16-18), so also Christ (Matt. 26:64), and Paul (Rom. 9:1; Gal. 1:20; Phil. 1:8). The precept, "Swear not at all," refers probably to ordinary conversation between man and man (Matt. 5:34, 37). But if the words are taken as referring to oaths, then their intention may have been to show "that the proper sta”
- Psalms “Psalms 59:12 (Rotherham) — The sin of their mouth, The word of their lips, Let them then be captured in their pride, Both for the oath and for the deception they record.”
- Torrey's Topical Textbook “Torrey's Topical Textbook: Swearing Falsely — Forbidden -- Le 19:12; Nu 30:2; Mt 5:33. Hateful to God -- Zec 8:17. We should not love -- Zec 8:17. Fraud often leads to -- Le 6:2,3. Saints abstain from -- Jos 9:20; Ps 15:4. Blessedness of abstaining from -- Ps 24:4,5. The wicked Addicted to. -- Jer 5:2; Ho 10:4. Plead excuses for. -- Jer 7:9,10. Shall be judged on account of. -- Mal 3:5. Shall be cut off for. -- Zec 5:3. Shall have a curse upon their houses for. -- Zec 5:4. False witnesses guilty of -- De 19:16,18. Exemplified Saul. -- 1Sa 19:6,10. Shimei. -- 1Ki 2:41-43. Jews. -- Eze 16:59. Ze”
- Torrey's Topical Textbook “Torrey's Topical Textbook: Slander — An abomination to God -- Pr 6:16,19. Forbidden -- Ex 23:1; Eph 4:31; Jas 4:11. Includes Whispering. -- Ro 1:29; 2Co 12:20. Backbiting. -- Ro 1:30; 2Co 12:20. Evil surmising. -- 1Ti 6:4. Tale-bearing. -- Le 19:16. Babbling. -- Ec 10:11. Tattling. -- 1Ti 5:13. Evil speaking. -- Ps 41:5; 109:20. Defaming. -- Jer 20:10; 1Co 4:13. Bearing false witness. -- Ex 20:16; De 5:20; Lu 3:14. Judging charitably. -- Jas 4:11,12. Raising false reports. -- Ex 23:1. Repeating matters. -- Pr 17:9. Is a deceitful work -- Ps 52:2. Comes from the evil heart -- Mt 15:19; Lu 6:45.”
- Hebrews (Baptist/Reformed) “John Gill on Hebrews 3:11: So I sware in my wrath,.... Swearing is ascribed to God, to show the certainty of the thing spoken of; as of mercies, when he swears in love, and by his holiness; so here, of punishment, when he swears in wrath, in indignation, in sore displeasure, and the threatened evil is irrevocable and inevitable: they shall not enter into my rest; into the land of Canaan, called God's rest, because he promised it, and gave it to the Israelites as their rest; and where he himself had a place of rest; and where he gave the Messiah, the author of peace and rest; and which was a ”
- James (Nonconformist/Puritan) “Matthew Henry on James 5:12: This epistle now drawing to a close, the penman goes off very quickly from one thing to another: hence it is that matters so very different are insisted on in these few verses. I. The sin of swearing is cautioned against: But above all things, my brethren, swear not, etc., Jam 5:12. Some understand this too restrictedly, as if the meaning were, "Swear not at your persecutors, at those that reproach you and say all manner of evil of you; be not put into a passion by the injuries they do you, so as in your passion to be provoked to swear." This swearing is no doubt f”
- CCEL/NPNF (Eastern Orthodox) “John Chrysostom, Homilies on Acts & Romans: between angels and men. Say now, if one could fetch down an angel from heaven, and should bid him stand here and listen to our preaching, as one whose duty it is to conform himself thereto, would it not be shameful and preposterous? But if to be yet, like children, under teaching about these things be ridiculous; what must it be, not even to attend to these things: how great the condemnation, how great the shame! To be Christians still, and to have to learn that it is not right to swear! However, let us put up with that, lest we incur even worse ridi”