James 5:12

But, before all things, my brethren, do not swear, - either by heaven, or by the earth, or by any other oath; but let your Yea be yea, and your Nay nay, - lest, under judgment, ye fall.

Matthew 5:33-37

Again, ye have heard that it was said, to them of olden time, Thou shalt not swear falsely, - but shalt render unto the Lord, thine oaths.

Matthew 23:16-22

Alas for you, blind guides! that say - Whosoever shall swear by the Temple, it is, nothing, but, whosoever shall swear by the gold of the Temple, is bound:

1 Corinthians 11:34

If anyone be hungry, at home, let him eat, lest, unto judgment, ye be coming together. And, the remaining things, whensoever I come, I will set in order.

2 Corinthians 1:17-20

This, then, being my purpose, perhaps, after all, with lightness, I dealt with the matter ? or, the things that I purpose, according to the flesh, I purpose, - that, with me, should be the Yea, yea, and the Nay, nay?

James 3:1-2

Not, many teachers, become ye, my brethren, knowing that, a severer sentence, shall ye receive;

1 Peter 4:8

Before all things, keeping, fervent, your love, among yourselves, because, love, covereth a multitude of sins;

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.

Above

General references

Bible References

Above

1 Peter 4:8
Before all things, keeping, fervent, your love, among yourselves, because, love, covereth a multitude of sins;

Swear not

Matthew 5:33
Again, ye have heard that it was said, to them of olden time, Thou shalt not swear falsely, - but shalt render unto the Lord, thine oaths.
Matthew 23:16
Alas for you, blind guides! that say - Whosoever shall swear by the Temple, it is, nothing, but, whosoever shall swear by the gold of the Temple, is bound:

But

2 Corinthians 1:17
This, then, being my purpose, perhaps, after all, with lightness, I dealt with the matter ? or, the things that I purpose, according to the flesh, I purpose, - that, with me, should be the Yea, yea, and the Nay, nay?

Lest

James 3:1
Not, many teachers, become ye, my brethren, knowing that, a severer sentence, shall ye receive;
1 Corinthians 11:34
If anyone be hungry, at home, let him eat, lest, unto judgment, ye be coming together. And, the remaining things, whensoever I come, I will set in order.

General references

Deuteronomy 5:11
Thou shalt not utter the name of Yahweh thy God, for falsehood, - for Yahweh will not at him go unpunished who uttereth his name for falsehood: