حَدَّثَنَا ابْنُ أَبِي الاسْوَدِ، قَالَ: حَدَّثَنَا عَبْدُ الْمَلِكِ بْنُ عَمْرٍو، قَالَ: حَدَّثَنَا سَحَّامَةُ بْنُ عَبْدِ الرَّحْمَنِ بْنِ الأَصَمِّ قَالَ: سَمِعْتُ أَنَسَ بْنَ مَالِكٍ يَقُولُ: كَانَ النَّبِيُّ صلى الله عليه وسلم رَحِيمًا، وَكَانَ لاَ يَأْتِيهِ أَحَدٌ إِلاَّ وَعَدَهُ، وَأَنْجَزَ لَهُ إِنْ كَانَ عِنْدَهُ، وَأُقِيمَتِ الصَّلاَةُ، وَجَاءَهُ أَعْرَابِيٌّ فَأَخَذَ بِثَوْبِهِ فَقَالَ: إِنَّمَا بَقِيَ مِنْ حَاجَتِي يَسِيرَةٌ، وَأَخَافُ أَنْسَاهَا، فَقَامَ مَعَهُ حَتَّى فَرَغَ مِنْ حَاجَتِهِ، ثُمَّ أَقْبَلَ فَصَلَّى.
Anas ibn Malik said, "The Prophet, may Allah bless him and grant him peace, was merciful. No one came to him but that he promised him something and carried out that promise, if he had anything to give. The iqama for the prayer had been given when a bedouin came, took hold of his garment, and stated, 'I am still not satisfied and I'm afraid of forgetting'. The Prophet went with him until the man had received what he wanted then he returned and prayed."
Cited in Al-Adab al-Mufrad (No. 278).