Matthew 5:33-34

Again, you have heard that it was said to the ancients: You shall not swear falsely, but shall pay to the Lord your vows.

James 5:12

But above all things, my brethren, swear not, either by heaven, or by the earth, or with any other oath: but let your yes, be yes, and your no, be no, lest you fall into 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, you have heard that it was said to the ancients: You shall not swear falsely, but shall pay to the Lord your vows.
James 5:12
But above all things, my brethren, swear not, either by heaven, or by the earth, or with any other oath: but let your yes, be yes, and your no, be no, lest you fall into condemnation.