By these words the evangelist expounds only what our Saviour meant in the former verse, when he had told them they were not all clean; for though the disciples did not yet know that they had a traitor amongst them, Satan had before this put the design into the heart of Judas, 1 Thessalonians 13:2; and Christ, who knew all hearts, knew what was in the heart of Judas, and he soon after (as we shall hereafter in this chapter read) revealed it; yet at this time he had not revealed it to his disciples: now he begins to discover it, telling them, that though the most of them were clean, justified and sanctified, yet all of them were not so.
Related Commentaries of John 13:11
John 13:11
11 For he knew who should betray him; therefore said he, Ye are not all clean.