(17) باب كَرَاهِيَةِ التَّطَاوُلِ عَلَى الرَّقِيقِ
Narrated Abu Huraira:
The Prophet (ﷺ) said, "You should not say, 'Feed your lord (Rabbaka), help your lord in performing ablution, or give water to your lord, but should say, 'my master (e.g. Feed your master instead of lord etc.) (Saiyidi), or my guardian (Maulai), and one should not say, my slave (Abdi), or my girl-slave (Amati), but should say, my lad (Fatai), my lass (Fatati), and 'my boy (Ghulami).
Reference: Sahih al-Bukhari 2552
In-book reference: Book 49, Hadith 36
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 46, Hadith 728