For thou art a valiant man— His being a valiant man was no great argument of recommendation in the present case. The original word is rendered virtuous in Proverbs 12:4 and would be so rendered with much greater propriety here. The Targum has it, thou art a man who fearest to sin. The marginal reference confirms this interpretation.
Related Commentaries of 1 Kings 1:42
1 Kings 1:42
42 And while he yet spake, behold, Jonathan the son of Abiathar the priest came: and Adonijah said unto him, Come in; for thou art a valiant man, and bringest good tidings.