Charles Ellicott Commentary Isaiah 62:9

"but they that have garnered it shall eat it, and praise Jehovah; and they that have gathered it shall drink it in the courts of my sanctuary." — Isaiah 62:9 (ASV)

In the courts of my holiness. — Better, of my sanctuary. The harvest and the vintage festivals are to be kept, as of old, without interruption, the master of the house, with his family and the Levites and the poor (Deuteronomy 14:22–27), eating of the firstfruits before the Lord.