Abigail's husband, Nabal, was an illtempered, drunken man. When David was hiding from the jealous King Saul, he asked Nabal for food for himself and his men. Nabal blatantly refused. Angered, David threatened to plunder Nabal's possessions and kill Nabal himself. Abigail, in her wisdom, gathered enough food for David's men, rode out to meet David, and bowed before him to show her respect. By agreeing with David that Nabal had acted with great disrespect, she stemmed David's anger. To Abigail's credit, she did not leave her godless husband. When Nabal died, apparently from shock at discovering his near brush with death, David married Abigail.
Just because David had multiple wives doesn’t mean that God condones it.

David is given yet another opportunity to kill Saul. All the men in Saul’s camp were sleeping “because the Lord had put them into a deep sleep.” Was this a test for David?

David knew he would be king at the death of Saul. He still did the Lord’s will and still insists that the Lord’s anointed is not to be killed. David's kingship was in God's hands and in God's time.

Our lives are in God's hands and He operates according to His time. Not so easy for us to accept at times, is it?