Contradiction with Psalm 121:4
This verse states that God does not slumber or sleep, which contrasts with Isaiah 42:14 where God is depicted as having held His peace and refrained from action.
Psalm 121:4: Behold, he that keepeth Israel shall neither slumber nor sleep.
Contradiction with Habakkuk 1:13
This verse says God's eyes are too pure to look on evil, which can contradict Isaiah 42:14 where God's silence and restraint may imply tolerance of wrongdoing.
Habakkuk 1:13: [Thou art] of purer eyes than to behold evil, and canst not look on iniquity: wherefore lookest thou upon them that deal treacherously, [and] holdest thy tongue when the wicked devoureth [the man that is] more righteous than he? [iniquity: or, grievance]
Contradiction with 2 Peter 3:9
This verse indicates that God is not slow in fulfilling promises but is patient, unlike Isaiah 42:14 which could suggest God has delayed actions or been inactive.
2 Peter 3:9: The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance.