As used in the scriptures, usually a sacred covenant or promise. However, wicked persons, including Satan and his angels, also make oaths to accomplish their evil purposes. In Old Testament times, oaths were acceptable; however, Jesus Christ taught that people should not swear in the name of God or his creations (Matt. 5: 33-37).

I will perform the oath which I swear unto Abraham, Gen. 26: 3. If a man swears an oath to bind his soul, he shall not break it, Num. 30: 2. They entered into an oath to walk in God's law, Neh. 10: 29. Thou shalt perform unto the Lord thine oaths, Matt. 5: 33 (Eccl. 5: 1-2; 3 Ne. 12: 33). God swears with an oath that the faithful shall be saved, Heb. 6: 13-18. When Zoram made an oath, our fears did cease, 1 Ne. 4: 37. The people of Ammon took an oath that they would never shed blood, Alma 53: 11. The wicked Nephites made secret oaths and covenants with Satan, Hel. 6: 21-30. Men gain eternal life through the oath and covenant of the priesthood, D&C 84: 33-42. All covenants, contracts, bonds, obligations, and oaths not sealed by the Holy Spirit of Promise end when men die, D&C 132: 7.