John Gill Commentary 1 Samuel 18:28

"And Saul saw and knew that Jehovah was with David; and Michal, Saul`s daughter, loved him." — 1 Samuel 18:28 (ASV)

And Saul saw and knew that the Lord [was] with David. This he perceived by the favour he gave him among men, by overruling all the steps Saul took to do him hurt, for his good, and in giving him success in all that he engaged in; the Targum is, ``that the Word of the Lord was for the help of David:''

and [that] Michal, Saul's daughter, loved him; and therefore could entertain no hope of making use of her as an instrument of his ruin, but, on the contrary, would, out of her great affection to her husband, betray the designs of her father against him, and do all she could to preserve him.