In this mountain; in Mount Zion, to wit, in God's church, which is very frequently meant by the names of Zion and Jerusalem, both in the Old and in the New Testament. Make unto all people, both Jews and Gentiles, who shall then be admitted to the participation of the same privileges and ordinances, a feast of fat things; a feast made up of the most exquisite and delicate provisions; which is manifestly meant of the ordinances, graces, and comforts given by God in and to his church. Of wines on the lees; which have continued upon the lees a competent time, whereby they gain strength, and afterwards drawn off from the lees, and so refined, as it is explained in the next clause.
Related Commentaries of Isaiah 25:6
Isaiah 25:6
6 And in this mountain shall the LORD of hosts make unto all people a feast of fat things, a feast of wines on the lees, of fat things full of marrow, of wines on the lees well refined.