Matthew Poole and continuators on Esther 5:6

6 And the king said unto Esther at the banquet of wine , What is thy petition? and it shall be granted thee: and what is thy request? even to the half of the kingdom it shall be performed.

Either 1. At the latter end of the feast, when they used to drink Wine more freely, whereas in the former part, most of their drink was water. Or, 2. At her banquet; which is so called, because it consisted not of meats, which probably the King had plentifully eaten before at his own Table, but of Fruits and Wines; which banquets were very frequent among the Persians.