Matthew 16:1-8

One day some of the Pharisees and those of the Jewish sect known as the Sadducees approached Jesus, insisting that he prove to them that he was the Messiah. “Show us a supernatural sign from heaven,” they demanded. Jesus answered, “You can read the signs of the weather, for you say, ‘Red sky at night, sailors delight.’ And, ‘Red sky in the morning, sailors take warning.’ You’re so adept at forecasting the weather by looking at the sky, but you’re absolutely clueless in reading the obvious signs of the times. A wicked and wayward generation always asks for signs, but the only sign I provide for you will be the sign of Jonah the prophet.” Then he turned away and left them. Later, as Jesus and his disciples crossed over to the other side of Lake Galilee, the disciples realized they had forgotten to bring any loaves of bread. Jesus spoke up and said, “Watch out for the yeast of the Pharisees and the Sadducees.” Thinking Jesus was scolding them over not bringing bread, they began to discuss it among themselves. Knowing their thoughts, Jesus said to them, “You have such little faith! Why are you arguing with one another about having no bread?