1 Kings 3:7

I am but a little child; 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 eighteen years old, Genesis 21:14,15, and to Rehoboam when forty-one years old, 2 Chronicles 13:7, where the word is the same in the Hebrew; and before this time David calls him a wise man, 1 Kings 2:9: but he was now not above twenty 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. To go out or come in, i.e. to govern my people, and manage affairs, as that phrase signifies, Numbers 27:17 Deuteronomy 31:2 Joshua 14:11.