Contradiction with 1 Samuel 15:22
Highlights obedience to God's commands as superior to sacrifice, while Isaiah 58:6 emphasizes loosening bonds of wickedness as a form of fast.
1 Samuel 15:22: And Samuel said, Hath the LORD [as great] delight in burnt offerings and sacrifices, as in obeying the voice of the LORD? Behold, to obey [is] better than sacrifice, [and] to hearken than the fat of rams.
Contradiction with Matthew 6:16-18
Discusses fasting in secret rather than public acts, contrasting with Isaiah 58:6's focus on social justice as true fasting.
Matthew 6:16-18: Moreover when ye fast, be not, as the hypocrites, of a sad countenance: for they disfigure their faces, that they may appear unto men to fast. Verily I say unto you, They have their reward.
Contradiction with Mark 2:19-20
Suggests a time for fasting is necessary, while Isaiah 58:6 presents acts of justice as the essence of fasting.
Mark 2:19-20: And Jesus said unto them, Can the children of the bridechamber fast, while the bridegroom is with them? as long as they have the bridegroom with them, they cannot fast.