Matthew 5:33-34

Again, ye have heard that it hath been said to the antients, "Thou shalt not for swear thy self, but shalt perform unto the Lord thine oaths."

James 5:12

Above all things, my brethren, don't swear, neither by the heaven, nor by the earth, nor use any other oath; but let your affirmation, or negation, be sincere, lest you fall under condemnation.

Treasury of Scripture Knowledge

Summary

Thou shalt not take the name of the LORD thy God in vain: for the LORD will not hold him guiltless that taketh his name in vain.

General references

Bible References

General references

Matthew 5:33
Again, ye have heard that it hath been said to the antients, "Thou shalt not for swear thy self, but shalt perform unto the Lord thine oaths."
James 5:12
Above all things, my brethren, don't swear, neither by the heaven, nor by the earth, nor use any other oath; but let your affirmation, or negation, be sincere, lest you fall under condemnation.