In the thirty-ninth year of Judah's King Uzziah, Shallum son of Jabesh became king; he reigned in Samaria a full month.
References for 2 Kings 15:13
Then Menahem son of Gadi came up from Tirzah to Samaria and struck down Shallum son of Jabesh there. He killed him and became king in his place.
As for the rest of the events of Shallum's [reign], along with the conspiracy that he formed, they are written about in the Historical Record of Israel's Kings.
At that time, [starting] from Tirzah, Menahem attacked Tiphsah, all who were in it, and its territory. Because they wouldn't surrender, he attacked [it and] ripped open all the pregnant women.
References for 2 Kings 15:16