As thousands of people crowded together, so that they were stepping on each other, Jesus said first to his disciples, "Be on guard against the yeast of the Pharisees - I mean their hypocrisy. 1
References for Luke 12:1
12.1 Mt 16.6; Mk 8.15.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.