وَحَدَّثَنَاهُ أَحْمَدُ بْنُ حَنْبَلٍ، وَزُهَيْرُ بْنُ حَرْبٍ، جَمِيعًا عَنْ إِسْمَاعِيلَ، - وَاللَّفْظُ لأَحْمَدَ - قَالاَ حَدَّثَنَا إِسْمَاعِيلُ بْنُ إِبْرَاهِيمَ، حَدَّثَنَا عَبْدُ الْعَزِيزِ، عَنْ أَنَسٍ، قَالَ لَمَّا قَدِمَ رَسُولُ اللَّهِ صلى الله عليه وسلم الْمَدِينَةَ أَخَذَ 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 وَاللَّهِ مَا قَالَ لِي لِشَىْءٍ صَنَعْتُهُ لِمَ صَنَعْتَ هَذَا هَكَذَا وَلاَ لِشَىْءٍ لَمْ أَصْنَعْهُ لِمَ لَمْ تَصْنَعْ هَذَا هَكَذَا

Anas reported: When Allah's Messenger (PBUH) came to Medina, Abla Talha took hold of my hand and brought me to Allah's Messenger (PBUH) and said: Allah's Messenger, Anas is a prudent young boy, and he will serve you. He (Anas) said: I served him in journey and at home, but, by Allah, he never asked me about a thing which I did as to why I did so, nor about a thing which I did not do as to why I had not done that. Translation Not Available

Book Ref: Sahih Muslim Book 43 Hadith 5722
Web Ref:  Sahih Muslim Book 30 Hadith 2309 c