Matthew Henry on 1 Samuel 20:24-34
Jonathan is here effectually convinced of that which he was so loth to believe, that his father had an implacable enmity to David, and would certainly be the death of him if it were in his power; and he had like to have paid very dearly himself for the conviction.
I. David is missed from the feast on the first day, but nothing is said of him. The king sat upon his seat, to feast upon the peace-offerings as at other times (Sa1 20:25), and yet had his heart as full of envy and malice against David as it could hold. He should first have been reconciled to him, and then have come and offered his gift; but, instead of that, he hoped, at this feast, to drink the blood of David. What an abomination…
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on the morrow, which was the second day of the month--The time of the moon's appearance being uncertain--whether at midday, in the evening, or at midnight, the festival was extended over two days. Custom, not the law, had introduced this.
Saul said unto Jonathan his son, Wherefore cometh not the son of Jesse--The question was asked, as it were, casually, and with as great an air of indifference as he could assume. And Jonathan having replied that David had asked and obtained his permission to attend a family anniversary at Beth-lehem [Act 20:28-29], the pent-up passions of the king burst out in a most violent storm of rage and invective against his son.
Adam Clarke on 1 Samuel 20:29
Our family hath a sacrifice - Such sacrifices were undoubtedly festal ones; the beasts slain for the occasion were first offered to God, and their blood poured out before him; afterwards all that were bidden to the feast ate of the flesh. This was a family entertainment, at the commencement of which God was peculiarly honored.
John Gill on 1 Samuel 20:29
And he said, let me go, I pray thee, for our family hath a sacrifice in the city,.... In the city of Bethlehem where they lived, a peace offering on account of the new moon, and as an anniversary thanksgiving for the mercies of the year, 1 Samuel 20:6; and seeing, though he was not at the feast in one place, he observed it in another, his absence at court was the more excusable; and the rather, since it was kept by him with his own family, in his own city: besides, it is added:
and my brother he hath commanded me to be there; his elder brother Eliab, whose commands, as a younger brother, he judged he ought to obey; it is probable his father was now dead, since no mention is made of him, and…