2 Kings 17:9
And the children of Israel did secretly those things that were not right against the Lord their God, and they built them high places in all their cities, from the tower of the watchmen to the fenced city.
Cross-references
2 Kings 23:19 records Josiah's destruction of the high places built by Israel's kings — the very altars established here are later torn down.
Ezekiel 8:12 depicts elders worshiping idols secretly, believing God doesn't see — the same secret idolatry condemned here.
1 Kings 14:23 describes building high places on every high hill and under every green tree — the same idolatrous practice repeated here.
Deuteronomy 27:15 curses those who make idols and hide them in secret — exactly the kind of secret sin committed here.
Job 31:27 shows Job's refusal to be secretly enticed into idol worship — a stark contrast to Israel's secret sins here.
Hosea 12:11 condemns false worship at Gilgal, where altars are like heaps — echoes the pattern of building high places here.