Matthew Poole and continuators on 1 Kings 3:7

7 And now; O LORD my God, thou hast made thy servant king in stead of David my father: and I am but a little child : I know not how to go out or come in .

So he was in Years: not as if he were now but twelve Years old, as many gather from this name of Child; for that name is given to Ishmael, when 18 Years old, Gen. 21. 14, 15 and to Rehoboam when 41 Years old, 2 Chron. 13. 7. where the word is the same in the Hebrew and before this time David calls him a wise man, chap. 2. 9. but he was now not above 20 Years old; and withal (which he principally intends) he was raw and unexperienced, as a Child, in State-Affairs, and altogether unfit for so hard a task.

i. e. To govern my People, and manage Affairs, as that Phrase signifies, Num. 27. 17. Deut. 31. 2. Ios. 14. 11.