Ruling On Using The Words 'Abd And Amah (For Slaves) And Mawla And Sayyid (For Masters) Sahih Muslim 2249 c

وَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَأَبُو كُرَيْبٍ قَالاَ حَدَّثَنَا أَبُو مُعَاوِيَةَ، ح وَحَدَّثَنَا أَبُو سَعِيدٍ الأَشَجُّ، حَدَّثَنَا وَكِيعٌ، كِلاَهُمَا عَنِ الأَعْمَشِ، بِهَذَا الإِسْنَادِ وَفِي حَدِيثِهِمَا ‏"‏ وَلاَ يَقُلِ الْعَبْدُ لِسَيِّدِهِ مَوْلاَىَ ‏"‏ ‏.‏ وَزَادَ فِي حَدِيثِ أَبِي مُعَاوِيَةَ ‏"‏ فَإِنَّ مَوْلاَكُمُ اللَّهُ عَزَّ وَجَلَّ
Translation
This hadith has been reported on the authority of al-A'mash with the same chain of transmitters, and the words are that the servant should not say to his chief

My Lord, and Abu Mu'awiya made an addition:" For it is Allah, the Exalted and Glorious, Who is your Lord."