2 Chronicles 21:17

And his sons also, and his wives Whom they slew, all except Ahaziah and Athaliah, who possibly were hid in some secret place. So that there was never a son left him, save Jehoahaz Who is also called Ahaziah, a name of the same signification with Jehoahaz, and, by a small alteration of the letters, Azariah, (2 Chronicles 22:6,) the meaning of which word is akin to the other, all signifying the possession, strength, or help of the Lord. Thus blood was required for blood. Jehoram had slain all his brethren; they slay all his sons but one. And he had not escaped, had he not been of the house of David, which must not be extirpated, like that of Ahab, because a blessing was in it, no less a blessing than that of the Messiah.