'Letters' in the Bible

Then Hezekiah sent word throughout all Israel and Judah, and he also wrote letters to Ephraim and Manasseh to come to the Lord’s temple in Jerusalem to observe the Passover of Yahweh, the God of Israel.

So the couriers went throughout Israel and Judah with letters from the hand of the king and his officials, and according to the king’s command, saying, “Israelites, return to Yahweh, the God of Abraham, Isaac, and Israel so that He may return to those of you who remain, who have escaped from the grasp of the kings of Assyria.

He also wrote letters to mock Yahweh, the God of Israel, saying against Him:Just like the national gods of the lands that did not deliver their people from my power, so Hezekiah’s God will not deliver His people from my power.