Matthew Poole and continuators on 2 Kings 9:27

27 ¶ But when Ahaziah the king of Judah saw this, he fled by the way of the garden-house : and Jehu followed after him, and said, Smite him also in the chariot: and they did so at the going up to Gur, which is by Ibleam: and he fled to Megiddo, and died there .

By some secret way, hoping to escape, whilst they were busie about Ioram.

As you have done Ioram, for he also is of the House of Ahab, chap. 8. 18.

They smote or wounded him, but not mortally; either, supposing that the wound was mortal; or, being more remiss in executing Iehu's Sentence against him, because they were not so much concerned in his, as in Ioram's Death; or, because they had some kindness for him, either for his own, or for Iehoshaphat's, sake.

Quest. How doth this agree with 2 Chron. 22. 9. He sought Ahaziah: and they caught him, for he was hid in Samaria, and brought him to Iehu: and when they had slain him, &c? Ans. Either, First, Samaria is there to be understood, not of the City, but of the Kingdom, or Territory so called, 1 Kin. 13. 32. and elsewhere, in which Megiddo was: and so that may be noted to shew that he could not flee into his own Kingdom where he might have been safe; but was forced to take up in another part of the Kingdom of Israel, in the Territory of Samaria, and there to hide himself. Or, Secondly, If Samaria be the City, then the History is briefly and imperfectly described here, and the defects supplied there, (the Book of Chronicles being in great part written for that end, to supply things omitted in the Book of Kings) and out of both, the History may be thus compleated: He fled first to Megiddo, and thence to Samaria, where he was caught, and thence brought to Iehu, and by his Sentence was put to death at Megiddo, either because Iehu was there at that time upon some occasion; or, for some other reason, which at this distance of time we cannot understand.