Charles Ellicott Commentary 1 Chronicles 22:12

"Only Jehovah give thee discretion and understanding, and give thee charge concerning Israel; that so thou mayest keep the law of Jehovah thy God." — 1 Chronicles 22:12 (ASV)

Only the Lord give thee wisdom. —Better, at least may the Lord give, etc.; restricting the wish to one supremely important point. (For Solomon’s wisdom, compare 1 Kings 3:9–15.)

And give thee charge concerning Israel. —Rather, and appoint you over Israel (2 Samuel 7:11). Solomon had been indicated as David’s successor, and David intended it so; yet his wish and prayer for the Divine ratification of this Divine appointment was by no means superfluous, unless Solomon were exempt from human liability to err.

That thou mayest keep. —Rather, and may you keep (the infinitive construct): a favourite continuative construction with the chronicler.