Isaiah 7:20
In the same day shall the Lord shave with a razor that is hired, namely, by them beyond the river, by the king of Assyria, the head, and the hair of the feet: and it shall also consume the beard.
Cross-reference
Isaiah 10:6 also depicts Assyria as God's instrument of judgment, sent against a godless nation, reinforcing the same role for Assyria.
Isaiah 9:14-17 depicts God cutting off head and tail (leaders) — a parallel metaphor for removing honor via shaving or cutting.
2 Kings 16:7 shows Ahaz hiring the Assyrian king, which is the historical action that the 'razor hired' in this prophecy references.
2 Kings 16:8 details Ahaz sending silver and gold as payment to Assyria, directly illustrating the 'hired' razor of the prophecy.
2 Chronicles 28:20 says Assyria brought trouble instead of help, fulfilling the judgment implied by the shaving razor in this verse.
2 Chronicles 28:21 repeats that the tribute did not help Ahaz, reinforcing the prophetic warning that hiring Assyria would backfire.
Ezekiel 5:1-4 enacts the same shaving metaphor for judgment, dividing the hair — a direct parallel to Isaiah's razor imagery.
2 Kings 15:29 records the Assyrian invasion that Isaiah 7:20 prophesied — the historical fulfillment of the hired razor.
Amos 6:14 describes God raising a nation (Assyria) to oppress Israel from border to border — echoing the razor metaphor of Assyrian conquest in Isaiah.