Then be sure, Heb. know thou; for indeed David knew well enough that Saul designed to kill him.; but he useth this course for Jonathan's information and satisfaction, and for his own greater vindication, if he did wholly withdraw himself from Saul, and from his wife; which he foresaw he should be forced to do.
Related Commentaries of 1 Samuel 20:7
1 Samuel 20:7
7 If he say thus, It is well; thy servant shall have peace: but if he be very wroth, then be sure that evil is determined by him.