Contradiction with Matthew 5:37
Encourages simplicity in oaths, letting 'Yes' be 'Yes' and 'No' be 'No', without swearing by anything.
Matthew 5:37: But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil.
Contradiction with James 5:12
Advises against swearing oaths at all, preferring straightforward honesty in speech.
James 5:12: 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.