James 5:12

But above all, my fellow believers, do not swear, either by heaven or by earth or with any other oath; but let your yes be [a truthful] yes, and your no be [a truthful] no, so that you may not fall under judgment.

Matthew 5:33-37

“Again, you have heard that it was said to the men of old, ‘You shall not make false vows, but you shall fulfill your vows to the Lord [as a religious duty].’

Matthew 23:16-22

“Woe to you, blind guides, who say, ‘Whoever swears [an oath] by the sanctuary of the temple, that is nothing (non-binding); but whoever swears [an oath] by the gold of the temple is obligated [as a debtor to fulfill his vow and keep his promise].’

1 Corinthians 11:34

If anyone is too hungry [to wait], let him eat at home, so that you will not come together for judgment [on yourselves]. About the remaining matters [of which I was informed], I will take care of them when I come.

2 Corinthians 1:17-20

So then, was I indecisive or capricious when I was [originally] planning this? Or the things I plan, do I plan in a self-serving way like a worldly man, ready to say, “Yes, yes” and “No, no” [at the same time]?

James 3:1-2

Not many [of you] should become teachers [serving in an official teaching capacity], my brothers and sisters, for you know that we [who are teachers] will be judged by a higher standard [because we have assumed greater accountability and more condemnation if we teach incorrectly].

1 Peter 4:8

Above all, have fervent and unfailing love for one another, because love covers a multitude of sins [it overlooks unkindness and unselfishly seeks the best for others].

3 John 1:2

Beloved, I pray that in every way you may succeed and prosper and be in good health [physically], just as [I know] your soul prospers [spiritually].

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
Above all, have fervent and unfailing love for one another, because love covers a multitude of sins [it overlooks unkindness and unselfishly seeks the best for others].
3 John 1:2
Beloved, I pray that in every way you may succeed and prosper and be in good health [physically], just as [I know] your soul prospers [spiritually].

Swear not

Matthew 5:33
“Again, you have heard that it was said to the men of old, ‘You shall not make false vows, but you shall fulfill your vows to the Lord [as a religious duty].’
Matthew 23:16
“Woe to you, blind guides, who say, ‘Whoever swears [an oath] by the sanctuary of the temple, that is nothing (non-binding); but whoever swears [an oath] by the gold of the temple is obligated [as a debtor to fulfill his vow and keep his promise].’

But

2 Corinthians 1:17
So then, was I indecisive or capricious when I was [originally] planning this? Or the things I plan, do I plan in a self-serving way like a worldly man, ready to say, “Yes, yes” and “No, no” [at the same time]?

Lest

James 3:1
Not many [of you] should become teachers [serving in an official teaching capacity], my brothers and sisters, for you know that we [who are teachers] will be judged by a higher standard [because we have assumed greater accountability and more condemnation if we teach incorrectly].
1 Corinthians 11:34
If anyone is too hungry [to wait], let him eat at home, so that you will not come together for judgment [on yourselves]. About the remaining matters [of which I was informed], I will take care of them when I come.

General references

Deuteronomy 5:11
‘You shall not take the name of the Lord your God in vain [that is, irreverently, in false affirmations or in ways that impugn the character of God]; for the Lord will not hold guiltless nor leave unpunished the one who takes His name in vain [disregarding its reverence and its power].