2 Kings Chapter 17 and 2 Chronicles 7:14

2 Kings Chapter 17

Twelve years into Ahaz's reign in Judah, Hoshea starts up as king in Israel. He continues doing evil religious practices—presumably the "sins of Jeroboam"—but he apparently wasn't as bad as the kings who came before him.
He reigns for nine years and becomes a vassal of the King of Assyria. However, he betrays the King of Assyria by trying to create an alliance between Israel and Egypt and failing to pay his tribute to Assyria.
The King of Assyria is outraged. He imprisons Hoshea.
The Assyrian King invades Israel and takes over Samaria. He sends the people of Israel into exile, making them live in a city called Halah in the land of the Medes.

A Brief Explanation

The narrator gives his interpretation of these events:
This disaster happened because the people of Israel abandoned God, forgetting how he'd saved them during the Exodus.
They started to worship other gods and adopt foreign customs. They worshipped at high places, using sacred poles and pillars on hills and trees like the nations that God drove out of the land earlier.
They worshipped idols and failed to listen to all the prophets, who commanded them to do the right thing and obey God's commandments.
The people also made sacred images of two calves (related to the "Sins of Jeroboam"), worshipped Baal and the host of heaven (the stars and planets), sacrificed their children in fire, and practiced divination.
So, the narrator concludes, that's why the northern kingdom of Israel was destroyed and why the people were sent away. Only the tribe of Judah remained intact (down in Judah).
However, Judah didn't follow God's ways correctly either.
The narrator places the blame on "the sins of Jeroboam." They led Israel astray and ultimately caused the exile in Assyria which lasted until the narrator's day.

Not Exactly Simba

The King of Assyria repopulates Samaria with other (non-Israelite) people from across the Assyrian Empire.
When the new denizens fail to worship God, however, God sends lions to attack them, killing some people.
When the King of Assyria finds out, he says they should send an Israelite priest out of exile to teach the people the laws of the god of the land (meaning the God of Israel).
They do. The priest comes and does his job, but the people there continue to worship numerous other gods, as well as Israel's God.
The narrator lists some of the peoples and their gods, including the Sepharvites who burn their children in sacrifice to the gods Adrammelech and Anammelech.
They continued to practice this sort of religious worship up to the narrator's day. They didn't listen to the rules God had laid down for the Israelites about not worshipping other deities.

2 Chronicles 7:14

if my people, who are called by my name, will humble themselves and pray and seek my face and turn from their wicked ways, then I will hear from heaven, and I will forgive their sin and will heal their land.

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