(20) Abiathar.--Of those who dwelt at Nob, only one single priest, Abiathar, Ahimelech's son, seems to have escaped this general massacre. It has been suggested that when his father and the whole body of priests went to Gibeah, in accordance with the summons of King Saul, Abiathar remained behind to perform the necessary functions in the sanctuary, and when he heard of the death of his father and his brother priests, he made his escape, and eventually joined David. The exact period of his coming to the exiled band under David is uncertain; in many of the recitals in this Book no note of time is given. It is, therefore, probable that the meeting and interview with David--related in 1Samuel 22:20 and following verses--did not take place immediately after the massacre at Gibeah, nor even directly after the destruction of Nob. From the statement in 1Samuel 22:6 of 1 Samuel 23, it would appear that Abiathar only joined David at Keilah. From that time, however, Abiathar, who became after his father's death high priest, occupies an important place in the story of David's life. Throughout his reign he continued his faithful friend, and seems to have been a worthy holder of his important office. The close of his life, however, was a melancholy one. In the troubles which arose about the succession, in the last days of David's reign, he espoused the side of Adonijah, and was in consequence deposed by the successful Solomon from the high priesthood, and sent into banishment to Anathoth. (See 1Kings 2:26.)

Verses 20-23. - Abiathar escaped. Probably he was left in charge of the sanctuary when Ahimelech and the rest were summoned into the king's presence, and on news being brought of Saul's violence, at once made his escape, Naturally, as representing a family who, though originally Saul's friends, had suffered so much for David, he was kindly received, and a friendship commenced which lasted all David's life; but, taking at last Adonijah's side, he was deprived by Solomon of the high priesthood, and sent into honourable banishment at Anathoth (1 Kings 2:26). On hearing of the terrible tragedy from which Abiathar had escaped, David, with characteristic tenderness of conscience, accuses himself of being the cause of all this bloodshed. Perhaps he felt that when he saw Doeg at Nob he ought at once to have gone away, without implicating Ahimelech in his cause; but he could never have imagined that Saul would have treated innocent men so barbarously, and may have supposed that their sacred character as well as their guiltlessness would have secured them from more than temporary displeasure. David now warmly promises Abiathar safety and friendship, and possibly the inversion of the natural order, he that seeketh my life seeketh thy life (where the my and thy are transposed by the Septuagint in one of its usual improvements of the Hebrew text), is meant to express this entire oneness and close union henceforward of the two friends. As to the question when and where Abiathar joined David, see on 1 Samuel 23:6.

22:20-23 David greatly lamented the calamity. It is great trouble to a good man to find himself any way the cause of evil to others. He must have been much pained, when he considered that his falsehood was one cause of this fatal event. David speaks with assurance of his own safety, and promises that Abiathar should have his protection. With the Son of David, all who are his may be sure they shall be in safeguard, Ps 91:1. In the hurry and distraction David was continually in, he found time for communion with God, and found comfort in it.And one of the sons of Ahimelech, the son of Ahitub, named Abiathar, escaped,.... Who very probably was left by his father to take care of the sanctuary, and the holy things in it, when he and the rest of the priests were summoned to appear before Saul; who having heard of his bloody execution of them, before his messengers could get to Nob, took, the ephod, with the Urim and Thummim, and made his escape, as appears from 1 Samuel 23:6; this man succeeded his father in the high priesthood, and continued in it until the times of Solomon:

and fled after David; who was now removed, or removing from the forest of Hareth to Keilah, whither Abiathar followed him, and came to him there, 1 Samuel 23:6, and with whom only he could be safe, and therefore it was right to flee unto him.