Hosea 8:9
For they are gone up to Assyria, a wild ass alone by himself: Ephraim hath hired lovers.
Cross-reference
Hosea 2:5-7 develops the same adultery metaphor — Israel chases her lovers (foreign nations), thinking they provide for her, but will be blocked.
Hosea 2:10 adds that God will expose Israel's lewdness before those lovers, who cannot save her — the hired allies prove useless.
In Hosea 5:13, Ephraim also goes to Assyria for help — both verses criticize the same failed alliance.
In Hosea 7:11, Ephraim is like a silly dove calling to Assyria — same accusation of seeking foreign aid.
Hosea 12:1 explicitly mentions making a covenant with Assyria and carrying oil to Egypt — the same 'hiring lovers' as in 8:9.
Hosea 14:3 contrasts this sin — future repentance declares 'Asshur shall not save us', renouncing the very alliance sought in 8:9.
In 2 Kings 15:19, Menahem hires Pul of Assyria with silver — the historical event behind Hosea's 'hired lovers'.
In Jeremiah 2:24, Israel is also a wild ass in heat pursuing lovers — the same metaphor for adulterous pursuit of nations.
Ezekiel 16:33 directly mirrors the 'hiring lovers' — Israel gives gifts to her allies, reversing the normal pattern of prostitution.
Ezekiel 16:34 continues the reversal: Israel pays for lovers instead of being paid, exactly the 'hired' theme of Hosea 8:9.
In Ezekiel 23:5-9, Oholah lusts after Assyrians and hires lovers — the same prostitution metaphor for Israel's alliances.
2 Kings 18:11 shows the tragic outcome: the Assyria they hired later deports them — the ally becomes the conqueror.