They went out into the fields, harvested their vineyards, made some wine, and threw a party. Then they went into the temple of their god, ate, drank, and cursed Abimelech.

The young woman's father (that is, his father-in-law) made him stay there for three days while they ate and drank during his visit there.

So both of them sat down for a bit, ate and drank together, and the young woman's father invited the man, "Please, enjoy yourself and spend another night."