C. F. Keil and Franz Delitzsch on 1 Samuel 22:8

1Sa 22:8

“That you have all of you conspired against me, and no one informs me of it, since my son makes a covenant with the son of Jesse.” בּכרת, lit. at the making of a covenant. Saul may possibly have heard something of the facts related in 1Sa 20:12-17; at the same time, his words may merely refer to Jonathan’s friendship with David, which was well known to him. ואין־חלה, “and no one of you is grieved on my account ... that my son has set my servant (David) as a lier in wait against me,” i.e., to plot against my life, and wrest the throne to himself. We may see from this, that Saul was carried by his suspicions very far beyond the actual facts. “As at this day:” cf. Deu 8:18, etc.