Contradiction with Psalm 121:4
Contradicts with Isaiah 27:3 as it states God never slumbers, indicating 24/7 vigilance, whereas Isaiah 27:3 implies continuous yet restful care.
Psalm 121:4: Behold, he that keepeth Israel shall neither slumber nor sleep.
Contradiction with Isaiah 5:5-6
Contrasts with Isaiah 27:3 as it describes God removing protection and allowing a vineyard to become desolate, opposite of the guarding in Isaiah 27:3.
Isaiah 5:5-6: And now go to; I will tell you what I will do to my vineyard: I will take away the hedge thereof, and it shall be eaten up; [and] break down the wall thereof, and it shall be trodden down: [trodden...: Heb. for a treading]
Contradiction with Jeremiah 12:10-11
Contradicts Isaiah 27:3 by depicting shepherds destroying God’s vineyard, suggesting neglect rather than the protecting care as in Isaiah 27:3.
Jeremiah 12:10-11: Many pastors have destroyed my vineyard, they have trodden my portion under foot, they have made my pleasant portion a desolate wilderness. [pleasant...: Heb. portion of desire]
Contradiction with Matthew 21:33-43
This parable describes a vineyard that is leased to others and ultimately taken away, which contradicts Isaiah 27:3's assurance of God's continual protection.
Matthew 21:33-43: Hear another parable: There was a certain householder, which planted a vineyard, and hedged it round about, and digged a winepress in it, and built a tower, and let it out to husbandmen, and went into a far country: