Contradiction with Exodus 20:12
Genesis 27:26 involves deceit and lack of honor towards Isaac, which contradicts the commandment to honor one's father and mother.
Exodus 20:12: Honour thy father and thy mother: that thy days may be long upon the land which the LORD thy God giveth thee.
Contradiction with Proverbs 12:22
While Genesis 27:26 is part of a deceitful act, Proverbs states that lying lips are an abomination to the Lord.
Proverbs 12:22: Lying lips [are] abomination to the LORD: but they that deal truly [are] his delight.
Contradiction with Ephesians 4:25
Genesis 27:26 leads into a narrative of deception, whereas Ephesians urges to put away lying and speak truth.
Ephesians 4:25: Wherefore putting away lying, speak every man truth with his neighbour: for we are members one of another.
Contradiction with Colossians 3:9
The deceit surrounding Genesis 27:26 contradicts the directive to not lie to one another.
Colossians 3:9: Lie not one to another, seeing that ye have put off the old man with his deeds;
Contradiction with Psalm 51:6
Genesis 27:26 is part of a deceptive act, conflicting with the desire for truth in the inward being.
Psalm 51:6: Behold, thou desirest truth in the inward parts: and in the hidden [part] thou shalt make me to know wisdom.
Contradiction with 1 Peter 2:1
The deception in Genesis 27:26 contradicts the call to put aside deceit and hypocrisy.
1 Peter 2:1: Wherefore laying aside all malice, and all guile, and hypocrisies, and envies, and all evil speakings,
Contradiction with Matthew 5:37
While Genesis 27:26 and following involve deceit, Matthew urges that one's 'yes' be 'yes' and 'no' be 'no', suggesting honesty.
Matthew 5:37: But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil.