Riyad us Saliheen: Hadith 1617

Some people told me, "We visit our rulers and we tell them things contrary to those which we say when we depart from them."

`Abdullah bin `Umar (May Allah be pleased with them) replied: "In the era of the Messenger of Allah (ﷺ) we considered this to be an act of hypocrisy."

[Al-Bukhari].