Matthew 16

 The Savior warned His apostles - 

"...Take heed and beware of the leaven of the Pharisees and of the Sadducees."  (Matthew 16:6)

As they seemed somewhat confused of the meaning, the Savior explained - 

"How is it that ye do not understand that I spake it not to you concerning bread, that ye should beware of the leaven of the Pharisees and of the Sadducees?

12 Then understood they how that he bade them not beware of the leaven of bread, but of the doctrine of the Pharisees and of the Sadducees."  (Matthew 16:11–12)

We see this today with the doctrine of men being taught in society and to our children that seem to grow thtoughout all society.