2 Kings 16:4

16:4 He offered sacrifices and burned incense on the high places, on the hills, and under every green tree.

2 Kings 16:1

Ahaz’s Reign over Judah

16:1 In the seventeenth year of the reign of Pekah son of Remaliah, Jotham’s son Ahaz became king over Judah.

2 Kings 14:23

Jeroboam II’s Reign over Israel

14:23 In the fifteenth year of the reign of Judah’s King Amaziah, son of Joash, Jeroboam son of Joash became king over Israel. He reigned for forty-one years in Samaria.

Deuteronomy 12:2-3

12:2 You must by all means destroy all the places where the nations you are about to dispossess worship their gods – on the high mountains and hills and under every leafy tree. 12:3 You must tear down their altars, shatter their sacred pillars, burn up their sacred Asherah poles, and cut down the images of their gods; you must eliminate their very memory from that place.