Matthew 16:4-6

King James Version

⁴ A wicked and adulterous generation seeketh after a sign; and there shall no sign be given unto it, but the sign of the prophet Jonas. And he left them, and departed.

⁵ And when his disciples were come to the other side, they had forgotten to take bread.

⁶ Then Jesus said unto them, Take heed and beware of the leaven of the Pharisees and of the Sadducees.