Sahih al-Bukhari, Hadith 2768 ⓘ

Narrated Anas: When Allah's Messenger came to Medina; he did not have any servant. Abu Talha (Anas' step-father) took me to Allah's Messenger and said, "O Allah's Messenger! 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.

حَدَّثَنَا يَعْقُوبُ بْنُ إِبْرَاهِيمَ بْنِ كَثِيرٍ، حَدَّثَنَا ابْنُ عُلَيَّةَ، حَدَّثَنَا عَبْدُ الْعَزِيزِ، عَنْ أَنَسٍ ـ رضى الله عنه ـ قَالَ قَدِمَ رَسُولُ اللَّهِ صلى الله عليه وسلم الْمَدِينَةَ لَيْسَ لَهُ خَادِمٌ، فَأَخَذَ أَبُو طَلْحَةَ بِيَدِي، فَانْطَلَقَ بِي إِلَى رَسُولِ اللَّهِ صلى الله عليه وسلم فَقَالَ يَا رَسُولَ اللَّهِ إِنَّ أَنَسًا غُلاَمٌ كَيِّسٌ، فَلْيَخْدُمْكَ‏.‏ قَالَ فَخَدَمْتُهُ فِي السَّفَرِ وَالْحَضَرِ، مَا قَالَ لِي لِشَىْءٍ صَنَعْتُهُ لِمَ صَنَعْتَ هَذَا هَكَذَا وَلاَ لِشَىْءٍ لَمْ أَصْنَعْهُ لِمَ لَمْ تَصْنَعْ هَذَا هَكَذَا