John 6:41 - Ellicott's Commentary On The Whole Bible

The Jews murmured at him. — Better, concerning Him, as in John 7:12; John 7:32. Here, too, it was “among themselves” (John 6:43). With the true spirit of objectors, they do not regard what He has since said in explanation, but fasten upon what they do not understand in its most striking form. Perhaps they have not listened to what has followed; indeed, the words imply that they were for some time talking to one another, and interrupting His discourse, and that this led to His answering them. They are the Jewish authorities, representing, and probably in part consisting of, members of the Sanhedrin. (Comp. Note on John 1:19.)