The priest gave David some bread that only priests were allowed to eat, and he ate it. David knew that Saul’s servant Doeg would tell Saul that the priests of Nob had helped David. So he ran away to the land of the Philistines, and left the priests to their fate.
Saul summoned Ahimelek and his family, the priests of Nob. He asked them why they had betrayed him by giving his enemy food, a weapon, and advice from God. Ahimelek said he thought David was Saul’s loyal servant, and he had just been helping him as he always did.
Then Saul ordered his guards to kill all the priests, but they refused. So he ordered his servant Doeg to kill them, and he did. Doeg killed 85 priests, as well as all the people and animals in the whole town of Nob, except Ahimelek’s son Abiathar, who managed to escape.
David assured Abiathar that he would be safe with him, because David had knowingly gotten Abiathar’s family killed. And also because the man who wanted to kill Abiathar was also looking for David.
The moral of the story
Don’t help people, or you will die.