1 Kings 2:15

Thou knowest that the kingdom was mine He means that as the eldest living son of David, he could rightly claim it. Thus he in a way apologizes for his previous attempt to secure the succession to himself.

set their faces on me They looked forward to my accession and were resolved on bringing it about. Comp. Jeremiah 42:17 -the men that set their faces to go down into Egypt … shall die." Adonijah would thus also make it appear that the voice and goodwill of the people had been on his side.

for it was his from the Lord He professes his resignation to what has happened, and ascribes it to the Divine will that he may the better cloak his desires and intentions. Perhaps -it became his from the Lord" would give the force of his words better. It is to be noted how, as if in friendship, he speaks of Solomon as his brother.