The “prayer of Manasseh,” preserved to us in some manuscripts of the Septuagint, has no claim to be considered the genuine utterance of the Jewish king. It is the composition of a Hellenistic Jew, well acquainted with the Septuagint, writing at a time probably not much anterior to the Christian era.
The words of the seers that spake to him - See 2 Kings 21:11-15.
In the book of the kings of Israel - The writer of Chronicles usually speaks of “the book of the kings of, Judah and Israel” (or “Israel and Judah”). Here be designates the same compilation by a more compendious title, without (apparently) any special reason for the change. Compare 2 Chronicles 20:34.