Matthew Poole and continuators on 2 Kings 9:37

37 And the carcase of Jezebel shall be as dung upon the face of the field, in the portion of Jezreel, so that they shall not say, This is Jezebel .

These words are not extant in the place where this Prophecy is first mentioned, 1 King. 21. 23. but are here added, either by Iehu, by way of explication and amplification: or rather, because Elijah spoke them, though they be not there Recorded, as being for the substance of them contained in the former words; it being usual to insert some passages in following Writings, which had been omitted in the former.