Jamieson, Fausset and Brown on 1 Samuel 22:7-8

7-8. Hear now, ye Benjamites--This was an appeal to stimulate the patriotism or jealousy of his own tribe, from which he insinuated it was the design of David to transfer the kingdom to another. This address seems to have been made on hearing of David's return with his four hundred men to Judah. A dark suspicion had risen in the jealous mind of the king that Jonathan was aware of this movement, which he dreaded as a conspiracy against the crown.

1Sa 22:9-16. Doeg Accuses Ahimelech.