Matthew 16:8

8.Why do you think within yourselves, etc.? The disciples again show how little they had profited by the instructions of their Master, and by his wonderful works. What he had said about being on their guard against the leaven is rashly interpreted by them as if Christ intended only to withdraw them from outward intercourse. As it was customary among the Jews not to take food in company with irreligious men, the disciples imagine that the Pharisees were classed with such persons. This ignorance might perhaps have been endured; but they are forgetful of a favor which they lately received, and do not consider that Christ has the remedy his power to hinder them from being compelled to pollute themselves by meat and drink, and therefore he reproves them sharply, as they deserved. And certainly it was shameful ingratitude that, after having seen bread created out of nothing, and in such abundance as to satisfy many thousands of men, and after having seen this done twice, they are now anxious about bread, as if their Master did not always possess the same power. From these words we infer that all who have once or twice experienced the power of God, and distrust it for the future are convicted of unbelief; for it is faith that cherishes in our hearts the remembrance of the gifts of God, and faith must have been laid asleep, if we allow them to be forgotten.