Mark 8:13-16

Leaving them, He again boarded the boat and left for the other side. Now the disciples had forgotten to bring bread, and they had only one loaf with them in the boat. Jesus repeatedly ordered them, saying, “Watch out! Beware of the leaven of the Pharisees and the leaven of Herod.” They began discussing this with one another, saying, “It is because we have no bread [that He said this].”