James 5:12

And before all things, my brethren, swear not, neither by heaven, nor by earth, nor any other oath: and let your yea be yea; and nay, nay; that ye fall not under. judgment.

Matthew 5:33-37

Again, ye have heard, that it was said to the ancients, Thou shalt not swear a false oath, and thou shalt. return to the Lord thine oaths.

Matthew 23:16-22

Woe to you blind guides, saying, Whoever should swear by the temple, it is nothing; but whoever should swear by the gold of the temple, he is indebted!

1 Corinthians 11:34

And if any hunger, let him eat in the house; lest ye come together for judgment. And the rest when I come I will regulate.

2 Corinthians 1:17-20

Therefore I resolved this, much less did I use levity: or what I resolve, do I resolve according to the flesh, that there be with me yea, yea, and nay, nay

James 3:1-2

Be ye not many teachers, my brethren, knowing that we shall receive the greater judgment.

1 Peter 4:8

More than all having intent love among yourselves: for love shall cover a multitude of sins.

3 John 1:2

Dearly beloved, I pray above all things that thou succeed and be in good health, as thy soul succeeds.

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
More than all having intent love among yourselves: for love shall cover a multitude of sins.
3 John 1:2
Dearly beloved, I pray above all things that thou succeed and be in good health, as thy soul succeeds.

Swear not

Matthew 5:33
Again, ye have heard, that it was said to the ancients, Thou shalt not swear a false oath, and thou shalt. return to the Lord thine oaths.
Matthew 23:16
Woe to you blind guides, saying, Whoever should swear by the temple, it is nothing; but whoever should swear by the gold of the temple, he is indebted!

But

2 Corinthians 1:17
Therefore I resolved this, much less did I use levity: or what I resolve, do I resolve according to the flesh, that there be with me yea, yea, and nay, nay

Lest

James 3:1
Be ye not many teachers, my brethren, knowing that we shall receive the greater judgment.
1 Corinthians 11:34
And if any hunger, let him eat in the house; lest ye come together for judgment. And the rest when I come I will regulate.

General references

Deuteronomy 5:11
Thou shalt not lift up the name of Jehovah thy God for evil, for Jehovah will not acquit whoever shall lift up his name for evil.