David Eating Bread

Mark says the high priest was Abiathar, but Samuel says it is Abiathar's father Ahimelek

Mark 2:25-26: "He answered, 'Have you never read what David did when he and his companions were hungry and in need? In the days of Abiathar the high priest, he entered the house of God and ate the consecrated bread, which is lawful only for priests to eat. And he also gave some to his companions.'"

[1 Samuel 21] David went to Nob, to Ahimelek the priest. Ahimelek trembled when he met him, and asked, “Why are you alone? Why is no one with you?”