Chapter 41: The Book Concerning the Use of Correct Words
Abu Huraira reported Allah' s Messenger (ﷺ) so many ahadith and one of them is this that Allah' s Messenger (ﷺ) said: 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.
Sahih Muslim 2249d