Matthew 16:7 - Ellicott's Commentary On The Whole Bible

It is because we have taken no bread. — There is a childish naïveté in their self-questioning which testifies to the absolute originality and truthfulness of the record, and so to the genuineness of the question which follows, and which assumes the reality of the two previous miracles. The train of thought which connected the warning and the fact was probably hardly formulated even in their own minds. It may be that they imagined that as the Pharisee would not eat of bread that had been defiled by the touch of heathen or publican, so their Master forbade them, however great their need, to receive food at the hands of either of the sects that had combined against Him.