God killed 27,000 Syrians with a falling wall

In his last killing, God killed the 100,000 Syrians for calling him a hill god. But some of the name-calling Syrians escaped. God took care of them by having a wall fall on them, killing 27,000.

But the rest fled to Aphek, into the city; and there a wall fell upon twenty and seven thousand of the men that were left. 1 Kings 20.30a

It was a really big wall.

Note: Benhadad (the king of Syria) somehow managed to escape the falling wall.

And Benhadad fled, and came into the city, into an inner chamber. 1 Kings 20.30b

He asked Ahab to let him live, offering to restore the cities that Syria had previously taken from Israel.

Thy servant Benhadad saith, I pray thee, let me live … And Ben-hadad said unto him, The cities, which my father took from thy father, I will restore; and thou shalt make streets for thee in Damascus, as my father made in Samaria. 1 Kings 20.32-34a

So Ahab made a treaty with Benhadad and let him live.

Then said Ahab, I will send thee away with this covenant. So he made a covenant with him, and sent him away. 1 Kings 20.34 b

God would later kill him and his family (see here, here, here, here, and here) for this act of mercy.

God's next killing: God sent a lion to kill a man for not smiting a prophet