James 5:12

Above all, my brothers, stop swearing, either by heaven or by the earth, or by anything else. Let your "Yes" mean Yes, and your "No," No, so as to keep from falling under condemnation.

Matthew 5:33-37

"Again, you have heard that it was said to the men of old, 'You must not swear falsely, but you must perform your oaths as a religious duty.'

Matthew 23:16-22

A curse on you, you blind leaders who say, 'Whoever swears by the sanctuary is not duty-bound, but whoever swears by the gold of the sanctuary is duty-bound.'

1 Corinthians 11:34

If anyone is hungry, let him eat at home, so that your meetings may not bring on you judgment. I will settle in detail the matters that remain, when I come.

2 Corinthians 1:17-20

Now I did not resort to fickleness, did I, in planning that? Or, do I make my plans in accordance with worldly notions, to have my "Yes" mean "No," if I want it so?

James 3:1-2

Many of you, my brothers, should avoid becoming teachers, because you know that we teachers are going to be judged with stricter judgment than other people.

1 Peter 4:8

Above everything else keep your love for one another fervent, because love covers up a multitude of sins.

3 John 1:2

Dearly beloved, I am praying for you to continue to prosper in everything, and to keep well, just as your soul is prospering.

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.

Bible References

Above

1 Peter 4:8
Above everything else keep your love for one another fervent, because love covers up a multitude of sins.
3 John 1:2
Dearly beloved, I am praying for you to continue to prosper in everything, and to keep well, just as your soul is prospering.

Swear not

Matthew 5:33
"Again, you have heard that it was said to the men of old, 'You must not swear falsely, but you must perform your oaths as a religious duty.'
Matthew 23:16
A curse on you, you blind leaders who say, 'Whoever swears by the sanctuary is not duty-bound, but whoever swears by the gold of the sanctuary is duty-bound.'

But

2 Corinthians 1:17
Now I did not resort to fickleness, did I, in planning that? Or, do I make my plans in accordance with worldly notions, to have my "Yes" mean "No," if I want it so?

Lest

James 3:1
Many of you, my brothers, should avoid becoming teachers, because you know that we teachers are going to be judged with stricter judgment than other people.
1 Corinthians 11:34
If anyone is hungry, let him eat at home, so that your meetings may not bring on you judgment. I will settle in detail the matters that remain, when I come.