In Mark 8, Jesus warned his disciples to beware of the leaven of the Pharisees and of whom?

Answer: Herod

With only one loaf in the boat, Jesus warned, "Beware of the leaven of the Pharisees and of Herod."

“Now the disciples had forgotten to take bread, except for one loaf they had with them in the boat. “Watch out!” He cautioned them. “Beware of the leaven of the Pharisees and of Herod.””— Mark 8:14-15 (BSB)