Doubting of whom ... - The word translated "doubting" denotes that kind of anxiety which a man feels when he is in perplexity, and knows not what to say or do. We should say they were at a loss. See the notes at Matthew 26:22.

Looked one on another doubting of whom he spake - See the notes on Matthew 26:20-25 (note). Every one but Judas, conscious of his own innocence, looked about upon all the rest, wondering who in that company could be such a traitor! Even Judas himself is not suspected. Is not this a proof that his general conduct had been such as to subject him to no suspicion?

Then the disciples looked one to another,.... As persons surprised and astonished, and as scarce crediting what was said; not having had the least suspicion of anyone among them, that could be guilty of such an action; and expressing by their looks their detestation of, and indignation at so horrible an iniquity; or they looked one to another, to observe if they could, whether the countenance of anyone would discover who the person was:

doubting of whom he spake; not being able to conceive and imagine, who the person was he had in view; from whence it appears, that Judas, to this time, had behaved outwardly as well as any of the other disciples; he had given no occasion, by his conduct, to suspect him more than any other: upon this broad intimation, or rather strong protestation which Christ made, that one of them should betray him, their eyes were not turned to him directly and particularly, but to one another.

Looked (ἔβλεπον)

The imperfect tense, kept looking as they doubted.

Doubting (ἀπορούμενοι)

See on Mark 6:20.

He spake (λέγει)

The present tense, speaketh, introduced with lively effect.

Then the disciples looked one on another, doubting of whom he spake.

22. the disciples looked one on another, doubting of whom he spake-Further intensely interesting particulars are given in the other Gospels: (1) "They were exceeding sorrowful" (Mt 26:22). (2) "They began to inquire among themselves which of them it was that should do this thing" (Lu 22:23). (3) "They began to say unto Him one by one, Is it I, and another, Is it I?" (Mr 14:19). Generous, simple hearts! They abhorred the thought, but, instead of putting it on others, each was only anxious to purge himself and know if he could be the wretch. Their putting it at once to Jesus Himself, as knowing doubtless who was to do it, was the best, as it certainly was the most spontaneous and artless evidence of their innocence. (4) Jesus, apparently while this questioning was going on, added, "The Son of man goeth as it is written of Him, but woe unto that man by whom the Son of man is betrayed! It had been good for that man if he had not been born" (Mt 26:24). (5) "Judas," last of all, "answered and said, Lord, is it I?" evidently feeling that when all were saying this, if he held his peace, that of itself would draw suspicion upon him. To prevent this the question is wrung out of him, but perhaps, amidst the stir and excitement at the table, in a half-suppressed tone as we are inclined to think the answer also was-"Thou hast said" (Mt 26:25), or possibly by little more than a sign; for from Joh 13:28 it is evident that till the moment when he went out, he was not openly discovered.

13:18-30 Our Lord had often spoken of his own sufferings and death, without such trouble of spirit as he now discovered when he spake of Judas. The sins of Christians are the grief of Christ. We are not to confine our attention to Judas. The prophecy of his treachery may apply to all who partake of God's mercies, and meet them with ingratitude. See the infidel, who only looks at the Scriptures with a desire to do away their authority and destroy their influence; the hypocrite, who professes to believe the Scriptures, but will not govern himself by them; and the apostate, who turns aside from Christ for a thing of naught. Thus mankind, supported by God's providence, after eating bread with Him, lift up the heel against Him! Judas went out as one weary of Jesus and his apostles. Those whose deeds are evil, love darkness rather than light.