Charles Spurgeon Commentary 1 Chronicles 28:4

"Howbeit Jehovah, the God of Israel, chose me out of all the house of my father to be king over Israel for ever: for he hath chosen Judah to be prince; and in the house of Judah, the house of my father; and among the sons of my father he took pleasure in me to make me king over all Israel;" — 1 Chronicles 28:4 (ASV)

He delights to dwell upon the election of God. It was not by the right of primogeniture that he was chosen king; it was by the will and good pleasure of God. Judah was one of the younger tribes, and yet it was made the royal tribe. In Judah, the house of Jesse was of no great importance; yet God chose it as the royal family; and in the household of Jesse, David was the youngest, yet the Lord liked him, and chose him to be king over all Israel.