Charles Ellicott Commentary Isaiah 51:22

"Thus saith thy Lord Jehovah, and thy God that pleadeth the cause of his people, Behold, I have taken out of thy hand the cup of staggering, even the bowl of the cup of my wrath; thou shalt no more drink it again:" — Isaiah 51:22 (ASV)

Your Lord the LORD ... —Note the emphatic combination of Adonai (or rather, in this solitary instance, of the plural Adonim used like Elohim) with Jehovah. Human necessity is once more God’s opportunity. He will plead for His people when no one else will plead. The cup of trembling will be taken from the hand of the forlorn castaway and given to her enemies. .