Narrated Muhammad bin Zaid bin `Abdullah bin `Umar
Some people said to Ibn `Umar, "When we enter upon our ruler(s) we say in their praise what is contrary to what we say when we leave them." Ibn `Umar said, "We used to consider this as hypocrisy."
Narrated Abu Huraira
Allah's Messenger (ﷺ)s said, "The worst of all mankind is the double-faced one, who comes to some people with one face and to others, with another face."