James 5:12

But before all things, my brothers, do not swear; neither by the heaven nor by the earth, nor any other oath. But let your yes be yes, and your no, no, lest you fall into condemnation.

Matthew 5:33-37

Again, you have heard that it has been said to the ancients, "You shall not swear falsely, but you shall perform your oaths to the Lord."

Matthew 23:16-22

Woe to you, blind guides, saying, Whoever shall swear by the temple, it is nothing; but whoever shall swear by the gold of the temple, he is a debtor.

1 Corinthians 11:34

But if anyone hungers, let him eat at home, so that you do not come together to condemnation. And the rest I will set in order when I come.

2 Corinthians 1:17-20

Then purposing this, did I indeed use lightness? Or the things that I purpose, do I purpose them according to the flesh, so that with me there should be yes, yes, and no, no?

James 3:1-2

My brothers, do not be many teachers, knowing that we shall receive the greater condemnation.

1 Peter 4:8

And above all things have fervent love to yourselves, for love will cover a multitude of sins.

3 John 1:2

Beloved, in regard to all things I pray that you prosper and be in health, even as your soul prospers.

Treasury of Scripture Knowledge

Summary

But above all things, my brethren, swear not, neither by heaven, neither by the earth, neither by any other oath: but let your yea be yea; and your nay, nay; lest ye fall into condemnation.

General references

Bible References

Above

1 Peter 4:8
And above all things have fervent love to yourselves, for love will cover a multitude of sins.
3 John 1:2
Beloved, in regard to all things I pray that you prosper and be in health, even as your soul prospers.

Swear not

Matthew 5:33
Again, you have heard that it has been said to the ancients, "You shall not swear falsely, but you shall perform your oaths to the Lord."
Matthew 23:16
Woe to you, blind guides, saying, Whoever shall swear by the temple, it is nothing; but whoever shall swear by the gold of the temple, he is a debtor.

But

2 Corinthians 1:17
Then purposing this, did I indeed use lightness? Or the things that I purpose, do I purpose them according to the flesh, so that with me there should be yes, yes, and no, no?

Lest

James 3:1
My brothers, do not be many teachers, knowing that we shall receive the greater condemnation.
1 Corinthians 11:34
But if anyone hungers, let him eat at home, so that you do not come together to condemnation. And the rest I will set in order when I come.

General references

Deuteronomy 5:11
You shall not take the name of Jehovah your God in vain, for Jehovah will not acquit the one who takes His name in vain.