Contradiction with Proverbs 12:22
While Genesis 38:22 discusses Shelah not being given to Tamar, Proverbs 12:22 states that "lying lips are abomination to the Lord," which contrasts with the deceit involved in this story.
Proverbs 12:22: Lying lips [are] abomination to the LORD: but they that deal truly [are] his delight.
Contradiction with Matthew 5:37
Genesis 38:22 involves discussions and promises not fulfilled, while Matthew 5:37 advises letting yes be yes and no be no, advocating for truthfulness.
Matthew 5:37: But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil.
Contradiction with James 1:26
The actions in Genesis 38:22 show a lack of control over one's commitments, whereas James 1:26 speaks of bridling one's tongue and suggests the importance of controlling one's words and actions.
James 1:26: If any man among you seem to be religious, and bridleth not his tongue, but deceiveth his own heart, this man's religion [is] vain.