Duplicity

“Whoever meets the Muslims with two faces and tongues, he on the Day of Judgment will be raised with two tongues of fire.”

“The worst servant (of Allah) is a servant who has two faces and tongues. He praises his brother (in belief) on his face and backbites him in his absence. If his brother (in belief) gains something, he envies him, and if…

“Allah, the Most Blessed, the Most High, said to Jesus, son of Mary (a.s.), ‘O Jesus, your tongue must be one tongue in private and in public so also must be your heart. I warn you against your own soul and Myself am a…