20:8 Deal kindly - In giving me timely notice, and a true account of Saul's disposition and intention towards me. A covenant of the Lord - That is, a solemn covenant, not lightly undertaken, but seriously entered into, in the name and fear of God, and in his presence, calling him to be the witness of our sincerity therein, and the avenger of perfidiousness in him that breaks it. Slay me - I am contented thou shouldst kill me. For why - Why shouldst thou betray me to thy father, by concealing his evil intentions from me?
20:1-10 The trials David met with, prepared him for future advancement. Thus the Lord deals with those whom he prepares unto glory. He does not put them into immediate possession of the kingdom, but leads them to it through much tribulation, which he makes the means of fitting them for it. Let them not murmur at his gracious appointment, nor distrust his care; but let them look forward with joyful expectation to the crown which is laid up for them. Sometimes it appears to us that there is but a step between us and death; at all times it may be so, and we should prepare for the event. But though dangers appear most threatening, we cannot die till the purpose of God concerning us is accomplished; nor till we have served our generation according to his will, if we are believers. Jonathan generously offers David his services. This is true friendship. Thus Christ testifies his love to us, Ask, and it shall be done for you; and we must testify our love to him, by keeping his commandments.