Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
WEB

2 Kings 15:25

Pekah the son of Remaliah, his captain, conspired against him and attacked him in Samaria, in the fortress of the king’s house, with Argob and Arieh; and with him were fifty men of the Gileadites. He killed him, and reigned in his place.

Read in other translations