Shallum, Jabesh's son, became king in the thirty-ninth year of Judah's King Uzziah. He ruled for one month in Samaria.
References for 2 Kings 15:13
Menahem, Gadi's son, went up from Tirzah and came to Samaria. He struck down Jabesh's son Shallum in Samaria, murdering him. Menahem then succeeded him as king.
The rest of Shallum's deeds and the conspiracy he plotted are written in the official records of Israel's kings.
Menahem then moved from Tirzah and attacked Tiphsah, all its citizens, and its neighboring areas. Because they wouldn't surrender, he attacked and ripped open all its pregnant women.
References for 2 Kings 15:16