1 Samuel 22:22

And David said unto Abiathar, I knew [it] that day
That is, he thought in his mind at that time: when Doeg the Edomite [was] there;
at Nob; in the tabernacle, at the same time that David was there: that he would surely tell Saul;
that he saw David there, and what passed between him and Ahimelech; he knew he was a spiteful mischievous man; that he was a true Edomite, though a proselyte, and bore hatred and enmity in his mind against an Israelite, and especially an Israelite indeed, as David was: I have occasioned [the death] of all the persons of thy father's house:
or have been the cause of all the evils that befell them, and the death they were put unto, not with design, but by accident; and it grieved him that he should be any ways an accessory thereunto, though without intention.