John 13:11 Commentary - Garner-Howes Baptist Commentary
1) "For he knew who should betray him," (edei gar ton paradidonta auton) "For he knew who was then betraying him," and who went out to enter a sales contract on Him later that same night, Joh 13:30. Mat 26:14-16 describes where he went and what he did, in premeditated preparation for the betrayal.
2) "Therefore said he," (dia touto eipen) "On account of this he said," to Peter and the others who were present that night, an extension of what He had told them before, though they had not understood it, nor did they, even then, Joh 6:64.
3) "Ye are not all clean." (hoti ouchai pantes katharoi este) "That you are not all clean," not all twelve of you twelve especially, Joh 13:18; Joh 13:26-30.
Consult other comments:
John 13:11 - The Greek Testament
John 13:11 - Albert Barnes' Notes on the Bible
John 13:11 - The Cambridge Bible for Schools and Colleges
John 13:11 - Companion Bible Notes, Appendices and Graphics
John 13:11 - Ellicott's Commentary for English Readers (Old and New Testaments)
John 13:11 - The Expositor’s Greek Testament by Robertson
John 13:11 - Garner-Howes Baptist Commentary
John 13:11 - John Gill's Exposition of the Entire Bible
John 13:11 - Gnomon of the New Testament
John 13:11 - Henry Alford's Greek Testament
John 13:11 - Jamieson, Fausset and Brown's Commentary Critical and Explanatory on the Whole Bible
John 13:11 - English Annotations on the Holy Bible by Matthew Poole
John 13:11 - Old and New Testaments Restoration Commentary
John 13:11 - Robertson's Word Pictures in the New Testament
John 13:11 - A Popular Commentary on the New Testament
John 13:11 - John Trapp's Complete Commentary (Old and New Testaments)
John 13:11 - The Treasury of Scripture Knowledge
John 13:11 - Vincent's Word Studies in the New Testament
John 13:11 - Whedon's Commentary on the Old and New Testaments
Garner-Howes Baptist Commentary

The Garner-Howes Baptist Commentary of the Whole Bible was originally published as a 23-volume set by Albert Garner (principal author) along with J. C. Howes, G.F. Crumley, and Eugene Garner in 1985. The Blessed Hope Foundation has released this digital edition into the public domain.