John Chrysostom — as excerpted in the Catena Aurea on John 6:60-71

“(Hom. xlvii. 3) This was the right way to retain them. Had He praised them, they would naturally, as men do, have thought that they were conferring a favour upon Christ, by not leaving Him: by shewing, as He did, that He did not need their company, He made them hold the more closely by Him. He does not say, however, Go away, as this would have been to cast them off, but asks whether they wished to go away; thus preventing their staying with Him from any feeling of shame or necessity: for to stay from necessity would be the same as going away. Peter, who loved his brethren, replies for the whole number, Lord, to whom shall we go?”