James 5:12

But above all things, my brethren, do not swear by heaven or by the earth or by any other oath, but let your yes be yes and your no, no; lest ye fall into condemnation.

Matthew 5:33-37

Again, ye have heard that it was said to the ancients, Thou shalt not perjure thyself, but shalt perform unto the Lord thine oaths;

Matthew 23:16-22

Woe unto you, ye blind guides, who say, Whosoever shall swear by the temple, it is nothing; but whosoever shall swear by the gold of the temple, he is a debtor!

1 Corinthians 11:34

And if anyone is hungry, let him eat at home; that ye not come together unto judgment. And I will set the rest in order when I come.

2 Corinthians 1:17-20

When I, therefore, was thus minded, did I use lightness? or the things that I purpose, do I purpose according to the flesh, that of me there should be yes, yes, and no, no?

James 3:1-2

My brethren, make not unto yourselves many teachers, knowing that we shall receive the greater condemnation.

1 Peter 4:8

And above all things have fervent charity among yourselves; for charity shall cover a multitude of sins.

3 John 1:2

Beloved, I wish that thou be prospered in all things and be sound, even as thy 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 charity among yourselves; for charity shall cover a multitude of sins.
3 John 1:2
Beloved, I wish that thou be prospered in all things and be sound, even as thy soul prospers.

Swear not

Matthew 5:33
Again, ye have heard that it was said to the ancients, Thou shalt not perjure thyself, but shalt perform unto the Lord thine oaths;
Matthew 23:16
Woe unto you, ye blind guides, who say, Whosoever shall swear by the temple, it is nothing; but whosoever shall swear by the gold of the temple, he is a debtor!

But

2 Corinthians 1:17
When I, therefore, was thus minded, did I use lightness? or the things that I purpose, do I purpose according to the flesh, that of me there should be yes, yes, and no, no?

Lest

James 3:1
My brethren, make not unto yourselves many teachers, knowing that we shall receive the greater condemnation.
1 Corinthians 11:34
And if anyone is hungry, let him eat at home; that ye not come together unto judgment. And I will set the rest in order when I come.

General references

Deuteronomy 5:11
Thou shalt not take the name of the LORD thy God in vain, for the LORD will not hold him innocent that takes his name in vain.