Matthew 5:34
But I tell you not to swear at all, either by heaven, for it is God's throne,
James 5:12
Above all, my brothers, do not swear an oath, either by heaven or by the earth, or by anything else; let your "Yes" be a plain Yes, and your "No" a plain No, or you will fall under condemnation.
Matthew 23:16-22
Alas for you, you blind guides, who say, 'If anyone swears by the sanctuary, it does not matter, but if anyone swears by the gold of the sanctuary, it is binding.'
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