How to reconcile Mark 2:25-26 with 1 Samuel 21:1-5?

1 Samuel 21:1-5 (NKJV) 1 Now David came to Nob, to Ahimelech the priest. And Ahimelech was afraid when he met David, and said to him, “Why are you alone, and no one is with you?” 2 So David said to Ahimelech the priest, “The king ha…