Isaiah 7:18 develops the imagery of Assyria as a summoned swarm, expanding on the king of Assyria brought in verse 17.

Isaiah 8:7 expands the same warning: the king of Assyria as a flood, bringing the days of judgment predicted in 7:17.

Isaiah 8:8 continues the flood metaphor, describing Assyria’s invasion reaching Judah—the very calamity prophesied in 7:17.

Isaiah 10:5 identifies Assyria as God’s rod of anger, naming the agent of judgment introduced in 7:17.

Isaiah 10:6 spells out the purpose: Assyria is sent against God’s people, fulfilling the threat of the king of Assyria from 7:17.

Isaiah 36:1 records the fulfillment: Sennacherib's invasion of Judah, the very 'king of Assyria' prophesied.

2 Chronicles 10:16-19 recounts the actual division of the kingdom when Israel rebelled against Rehoboam—the event Isaiah references as 'Ephraim separated from Judah'.

2 Chronicles 32 recounts Sennacherib's invasion under Hezekiah, directly fulfilling the prophecy of the king of Assyria.

1 Kings 12:16-20 describes the division of the kingdom, exactly the 'Ephraim broke away from Judah' that Isaiah 7:17 references.

1 Kings 12:19 states that Israel has been in rebellion against David's house—the same historic split that Isaiah 7:17 recalls as the time when Ephraim separated.

2 Kings 16:8 shows Ahaz bribing the Assyrian king, directly leading to the Assyrian invasion that Isaiah 7:17 warns will come upon Judah.

2 Kings 17:21 explicitly says the LORD tore Israel from the house of David—the very separation Isaiah 7:17 references as the prior time of trouble.

2 Kings 18:13 records Sennacherib's attack on Judah—the fulfillment of the Assyrian invasion prophesied in Isaiah 7:17.

Jeremiah 50:17 recalls Assyria as the first to devour Israel, confirming the judgment prophesied in verse 17.

2 Kings 19:17 describes Assyrian devastation of nations, echoing the same Assyrian threat that Isaiah 7:17 warns will come on Judah.

Amos 3:11 describes an enemy surrounding and looting, a similar judgment scene to the Assyrian invasion in verse 17.

2 Chronicles 33:11 describes Assyria taking Manasseh captive, a later example of God using Assyria to punish Judah.