Sahih Muslim 2249
Sahih Muslim · Book 40: The Book Concerning the Use of Correct Words · Ruling On Using The Words 'Abd And Amah (For Slaves) And Mawla And Sayyid (For Masters)
Abu Huraira reported Allah's Messenger (ﷺ) so many ahadith and one of them is this that Allah's Messenger (ﷺ) said:
وَحَدَّثَنَا مُحَمَّدُ بْنُ رَافِعٍ ، حَدَّثَنَا عَبْدُ الرَّزَّاقِ ، أَخْبَرَنَا مَعْمَرٌ ، عَنْ هَمَّامِ بْنِ مُنَبِّهٍ ، قَالَ هَذَا مَا حَدَّثَنَا أَبُو هُرَيْرَةَ ، عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم . فَذَكَرَ أَحَادِيثَ مِنْهَا وَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " لاَ يَقُلْ أَحَدُكُمُ اسْقِ رَبَّكَ أَطْعِمْ رَبَّكَ وَضِّئْ رَبَّكَ . وَلاَ يَقُلْ أَحَدُكُمْ رَبِّي . وَلْيَقُلْ سَيِّدِي مَوْلاَىَ وَلاَ يَقُلْ أَحَدُكُمْ عَبْدِي أَمَتِي . وَلْيَقُلْ فَتَاىَ فَتَاتِي غُلاَمِي " .
None of you should say: Supply drink to your lord, feed your lord, help your lord in performing ablution, and none of you should say: My Lord. He should say: My chief, my patron; and none of you should say: My bondman, my slave-girl, but simply say: My boy, my girl, my servant.