James 5:12
But above all things, my brethren, do not swear, either by Heaven or by the earth, or with any other oath. Let your 'yes' be simply 'yes,' and your 'no' be simply 'no;' that you may not come under condemnation.
Matthew 23:16-22
"Alas for you, you blind guides, who say, "'Whoever swears by the Sanctuary it is nothing; but whoever swears by the gold of the Sanctuary, is bound by the oath.'
Matthew 5:33-37
"Again, you have heard that it was said to the ancients, 'Thou shalt not swear falsely, but shalt perform thy vows to the Lord.'
Hebrews 6:16-17
For men swear by what is greater than themselves; and with them an oath in confirmation of a statement always puts an end to a dispute.
Matthew 26:63-64
Jesus however remained silent. Again the High Priest addressed Him. "In the name of the ever-living God," he said, "I now put you on your oath. Tell us whether you are the Christ, the Son of God."
2 Corinthians 1:23
But as for me, as my soul shall answer for it, I appeal to God as my witness, that it was to spare you pain that I gave up my visit to Corinth.