John Gill

For some of them thought,.... This was the thought of some of the disciples, it may be of all of them but John; because Judas had the bag: which was for the common supply of Christ and his disciples, and for the relief of the poor; See Gill on Joh 12:6. That Jesus had said unto him, buy those things that we have need of against the feast; the feast of the passover, which was to be two days after; and shows, that this was not the passover which Christ now ate with his disciples: or that he should give something to the poor; for whom Christ cared, and had a hearty concern, and for whom Judas had very little, notwithstanding his high pretensions.