To an idol that a craftsman casts
An idol is described as something crafted, cast, and overlaid with precious metal.
This verse highlights that idols are manufactured objects, not living divinity.
9Go up on a high mountain, 10Behold, the Lord GOD comes with might, 11He tends His flock like a shepherd; 12Who has measured the waters in the hollow of his hand, 13Who has directed the Spirit of the LORD, 14Whom did He consult to enlighten Him, 15Surely the nations are like a drop in a bucket; 16Lebanon is not sufficient for fuel, 17All the nations are as nothing before Him; 18To whom will you liken God? 19To an idol that a craftsman casts 20One lacking such an offering 21Do you not know? 22He sits enthroned above the circle of the earth; 23He brings the princes to nothing 24No sooner are they planted, no sooner are they sown, 25“To whom will you liken Me, 26Lift up your eyes on high: 27Why do you say, O Jacob, 28Do you not know? 29He gives power to the faint 30Even youths grow tired and weary, 31But those who wait upon the LORD will renew their strength;