The disciples had forgotten to take any bread along when they went to the other side of the Sea of Galilee.

             Jesus said to them, “Be careful! Watch out for the yeast of the Pharisees and Sadducees!” The disciples had been discussing among themselves that they had not taken any bread along.  Jesus knew about their conversation and asked, “Why are you discussing among yourselves that you don’t have any bread? You have so little faith! Don’t you understand yet? Don’t you remember the five loaves for the five thousand and how many baskets you filled?  Don’t you remember the seven loaves for the four thousand and how many large baskets you filled?  Why don’t you understand that I wasn’t talking to you about bread? Watch out for the yeast of the Pharisees and Sadducees!”  Then they understood that he didn’t say to watch out for the yeast in bread, but to watch out for the teachings of the Pharisees and Sadducees.