11 When they arrived, the Pharisees came out and started in on him, badgering him to prove himself, pushing him up against the wall. Provoked, he said, "Why does this generation clamor for miraculous guarantees? If I have anything to say about it, you'll not get so much as a hint of a guarantee." 13 He then left them, got back in the boat, and headed for the other side. But the disciples forgot to pack a lunch. Except for a single loaf of bread, there wasn't a crumb in the boat. Jesus warned, "Be very careful. Keep a sharp eye out for the contaminating yeast of Pharisees and the followers of Herod."