Mark 8:13-15

¹³And he went away from them, and again got into the boat and went across to the other side.

¹⁴And they had taken no thought to get bread; and they had only one cake of bread with them in the boat.

¹⁵And he said to them, Take care to be on the watch against the leaven of the Pharisees and the leaven of Herod.