But on the second day, the day after the new moon, David’s place was empty. And Saul said to Jonathan his son, “Why has not the son of Jesse come to the meal, either yesterday or today?”
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
And it came to pass on the morrow, which was the second day of the month,.... The Targum is,"and it was on the day after it, which was the intercalation of the second month;''when the beginning of the month was judged of by the appearance of the moon, and there was a difficulty about that, what day it appeared on, two days were kept for...
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.