James 5:12
But above all, my brethren, do not swear, either by heaven or by earth or with any other oath, but let your yes be yes and your no be no, that you may not fall under condemnation.
Matthew 23:16-22
"Woe to you, blind guides, who say, 'If any one swears by the temple, it is nothing; but if any one swears by the gold of the temple, he is bound by his oath.'
Matthew 5:33-37
"Again you have heard that it was said to those of old, 'You shall not swear falsely, but shall perform your oaths to the Lord.'
Hebrews 6:16-17
Men swear by one greater than themselves, and in all their disputes the oath is final for confirmation.
Matthew 26:63-64
But Jesus remained silent. And the high priest said to him, "I charge you under oath by the living God: tell us if you are the Christ, the Son of God."
2 Corinthians 1:23
But I call God as my witness that it was in order to spare you that I did not return to Corinth.