'Abdullah ibn Burayda reported from his father that the Messenger of Allah, may Allah bless him and grant him peace, said, "Do not call a hypocrite 'master'. He is not your master and you will have angered your Lord, the Mighty and Exalted."  

قَالَ رَسُولُ اللهِ ﷺ لاَ تَقُولُوا لِلْمُنَافِقِ سَيِّدٌ فَإِنَّهُ إِنْ يَكُ سَيِّدَكُمْ فَقَدْ أَسْخَطْتُمْ رَبَّكُمْ عَزَّ وَجَلَّ