And Jonathan rose from the table in fierce anger and ate no food the second day of the month, for he was grieved for David, because his father had disgraced him.
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.
Commenting on 1 Samuel 20:24-34
So Jonathan arose from the table in fierce anger,.... Resenting his father's attempt to smite him, and his resolution to slay David: and did eat no meat the second day of the month; not then at that meal he was just sat down to, nor at another time that day, his stomach was so full through indignation at his father, and grief for his friend...
Jonathan arose - in fierce anger - We should probably understand this rather of Jonathan's grief than of his anger, the latter clause explaining the former: for he was grieved for David. He was grieved for his father - he was grieved for his friend.