Contradiction with Matthew 5:34-37
This verse suggests avoiding all oaths, indicating that swearing by any oath is unnecessary, whereas Hebrews 6:16 speaks of swearing by something greater as a common practice to confirm truth.
Matthew 5:34-37: But I say unto you, Swear not at all; neither by heaven; for it is God's throne:
Contradiction with James 5:12
This verse advises against swearing oaths at all, which contradicts the notion presented in Hebrews 6:16 that confirms an oath as a means of ending disputes.
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.