(25) بَابُ اسْتِخْدَامِ الْيَتِيمِ فِي السَّفَرِ وَالْحَضَرِ إِذَا كَانَ صَلاَحًا لَهُ، وَنَظَرِ الأُمِّ وَزَوْجِهَا لِلْيَتِيمِ
Narrated Anas:
When Allah's Messenger (ﷺ) came to Medina; he did not have any servant. Abu Talha (Anas' step-father) took me to Allah's Messenger (ﷺ) and said, "O Allah's Messenger (ﷺ)! Anas is a wise boy, so let him serve you." So, I served him at home and on journeys. If I did anything, he never asked me why I did it, and if I refrained from doing anything, he never asked me why I refrained from doing it.
Reference: Sahih al-Bukhari 2768
In-book reference: Book 55, Hadith 31
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 4, Book 51, Hadith 29