Isaiah 37:8

Overview - Isaiah 37
1	Hezekiah mourning, sends to Isaiah to pray for them.
6	Isaiah comforts them.
8	Sennacherib, going to encounter Tirhakah, sends a blasphemous letter to Hezekiah.
14	Hezekiah's prayer.
21	Isaiah's prophecy of the pride and destruction of Sennacherib, and the good of Zion.
36	An angel slays the Assyrians.
37	Sennacherib is slain at Nineveh by his own sons.

Isaiah 37:8  (King James Version)
So Rabshakeh returned, and found the king of Assyria warring against Libnah: for he had heard that he was departed from Lachish.