In the fiftieth year of Judah's King Azariah, Pekahiah son of Menahem became king over Israel in Samaria; [he reigned] two years.
References for 2 Kings 15:23
He did what was evil in the Lord's sight and did not turn away from the sins Jeroboam son of Nebat had caused Israel to commit.
Then his officer, Pekah son of Remaliah, conspired against him and struck him down, as well as Argob and Arieh, in Samaria at the citadel of the king's palace. There were 50 Gileadite men with Pekah. He killed Pekahiah and became king in his place.
References for 2 Kings 15:25
As for the rest of the events of Pekahiah's [reign], along with all his accomplishments, they are written about in the Historical Record of Israel's Kings.