2 Kings 15:23

“In the fiftieth year of Azariah king of Judah, Pekahiah the son of Menahem began to reign over Israel in Samaria, etc.] As it was in the thirty ninth of Azariah that his father began his reign, and he reigned ten years, they must end in the forty ninth of Azariah, and therefore there must be an interregnum of a year; perhaps the title of Pekahiah might be disputed, and it was a year before he could get settled on the throne: and reigned two years; being slain by one of his captains, as after related.”

“PEKAHIAH'S REIGN. (Kg2 15:22-24) Pekahiah . . . son of Menahem began to reign--On comparing the date given with Azariah's reign, it seems that several months had intervened between the death of Menahem and the accession of Pekahiah, probably owing to a contest about the throne.”

“15:23-25 Menahem’s son Pekahiah reigned only two years before Pekah conspired to assassinate him. Pekahiah continued the sins associated with the religious policies initiated by Jeroboam I (1 Kgs 12:26-33). Pekah, an army commander, had apparently been a rival for the throne for some time.”

“am 3243, bc 761 and reigned two years: Kg2 21:19; Kg1 15:25, Kg1 16:8, Kg1 22:51; Job 20:5 4 Kings (2 Kings) 15:24”

“Reign of Pekahiah. - Pekahiah the son of Menahem began to reign "in the fiftieth year of Uzziah." As Menahem had begun to reign in the thirty-ninth year of Uzziah and reigned ten years, he must have died in the forty-ninth year of Uzziah; and therefore, if his son did not become king till the fiftieth year, some months must have elapsed between the death of Menahem and Pekahiah's ascent of the throne, probably cause, in the existing disorganization of the kingdom, the possession of the throne by the latter was opposed. Pekahiah reigned in the spirit of his predecessors, but only for two years, as his aide-de-camp (שׁלישׁ, see at Sa2 23:8) Pekah conspired against him and slew him in the…”