'Letters' in the Bible

Now Ahab had seventy sons in Samaria. And Jehu wrote letters and sent them to Samaria, to the rulers of Jezreel, the elders, and to the guardians of the children of Ahab, saying,

At that time Berodach-baladan a son of Baladan, king of Babylon, sent letters and a present to Hezekiah, for he heard that Hezekiah had been sick.