C. F. Keil and Franz Delitzsch on 1 Samuel 20:2

1Sa 20:2

Jonathan endeavoured to pacify him: “Far be it! thou shalt not die: behold, my father does nothing great or small (i.e., not the smallest thing; cf. 1Sa 25:36 and Num 22:18) that he does not reveal to me; why should my father hide this thing from me? It is not so.” The לו after הנּה stands for לא: the Chethibh עשׂה is probably to be preferred to the Keri יעשׂה, and to be understood in this sense: “My father has (hitherto) done nothing at all, which he has not told to me.” This answer of Jonathan does not presuppose that he knew nothing of the occurrences described in 1 Samuel 19:9-24, although it is possible enough that he might not have been with his father just at that time; but it is easily explained from the fact that Saul had made the fresh attack upon David’s life in a state of madness, in which he was no longer master of himself; so that it could not be inferred with certainty from this that he would still plot against David’s life in a state of clear consciousness. Hitherto Saul had no doubt talked over all his plans and undertakings with Jonathan, but he had not uttered a single word to him about his deadly hatred, or his intention of killing David; so that Jonathan might really have regarded his previous attacks upon David’s life as nothing more than symptoms of temporary aberration of mind.