حَدَّثَنَا مَخْلَدُ بْنُ خَالِدٍ الشَّعِيرِيُّ، حَدَّثَنَا عُمَرُ بْنُ يُونُسَ، حَدَّثَنَا عِكْرِمَةُ، - يَعْنِي ابْنَ عَمَّارٍ - قَالَ حَدَّثَنِي إِسْحَاقُ، - يَعْنِي ابْنَ عَبْدِ اللَّهِ بْنِ أَبِي طَلْحَةَ - قَالَ قَالَ أَنَسٌ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم مِنْ أَحْسَنِ النَّاسِ خُلُقًا فَأَرْسَلَنِي يَوْمًا لِحَاجَةٍ فَقُلْتُ وَاللَّهِ لاَ أَذْهَبُ ‏.‏ وَفِي نَفْسِي أَنْ أَذْهَبَ لِمَا أَمَرَنِي بِهِ نَبِيُّ اللَّهِ صلى الله عليه وسلم ‏.‏ قَالَ فَخَرَجْتُ حَتَّى أَمُرَّ عَلَى صِبْيَانٍ وَهُمْ يَلْعَبُونَ فِي السُّوقِ فَإِذَا رَسُولُ اللَّهِ صلى الله عليه وسلم قَابِضٌ بِقَفَاىَ مِنْ وَرَائِي فَنَظَرْتُ إِلَيْهِ وَهُوَ يَضْحَكُ فَقَالَ ‏"‏ يَا أُنَيْسُ اذْهَبْ حَيْثُ أَمَرْتُكَ ‏"‏ ‏.‏ قُلْتُ نَعَمْ أَنَا أَذْهَبُ يَا رَسُولَ اللَّهِ ‏.‏ قَالَ أَنَسٌ وَاللَّهِ لَقَدْ خَدَمْتُهُ سَبْعَ سِنِينَ أَوْ تِسْعَ سِنِينَ مَا عَلِمْتُ قَالَ لِشَىْءٍ صَنَعْتُ لِمَ فَعَلْتَ كَذَا وَكَذَا ‏.‏ وَلاَ لِشَىْءٍ تَرَكْتُ هَلاَّ فَعَلْتَ كَذَا وَكَذَا ‏.‏

Anas said: the Messenger of Allah (PBUH) was one of the best of men in character. One day he sent me to do something, and I said: I swore by Allah that I would not go. But in my heart I felt that I should go to do what the Prophet of Allah (PBUH) had commanded me; so I went out and came upon some boys who were playing in the street. All of a sudden the Messenger of Allah (PBUH) who had come up behind caught me by the back of the neck, and when I looked at him he was laughing. He said: Go where I ordered you, little Anas. I replied: Yes, I am going, Apostle of Allah! Anas said: I swear by Allah, I served him for seven or nine years, and he never said to me about a thing which I had done: Why did you do such and such? Nor about a thing which I left: why did not do such and such? Translation Not Available

Book reference: Sunan Abi Dawud Book 43 Hadith 4773
Web reference: Sunan Abi Dawud Book 42 Hadith 4755