Isaiah 51:22 - Exposition

The Lord … that pleadeth the cause of his people (comp. Jeremiah 50:34 , which contains an allusion to this passage). As his people have a relentless adversary, who accuses them continually, and pleads against them ( Revelation 12:10 ), so it is needful that they should have an untiring advocate. God himself is this Advocate. The dregs of the cup (see the comment on Isaiah 51:17 , ad fin. ) .