Because Judas had the bag. — Comp. Notes on John 12:6.
Buy those things that we have need of against the feast. — Here, again, it will be better to postpone the consideration of details in the order of the events of this week, and to deal with the question as a whole. (Comp. Excursus F: The Day of the Crucifixion of our Lord.)
That he should give something to the poor. — Such gifts seem to have been made at all festivals. Their thought was probably of gifts to enable the poor to obtain the lamb and other requisites for keeping the Passover.