Matthew 26:23 - Coke's Commentary on the Holy Bible

He that dippeth his hand with me, &c.— Grotius and others think this implies, that Judas had placed himself so near his Master, as to eat out of the same dish with him; but their way of lying on couches at meat, must have made it inconvenient for two or more persons to eat in that manner. It is more probable that the disciples, being in the deepest distress, had left off eating; only Judas, to conceal his guilt, continued the meal, and was dipping his meat into the haroseth, or thick sauce before mentioned, when Jesus happened to be putting his into it; which sauce, according to custom, was served up in a separate dish. See John 13:26.