Jami` at-Tirmidhi, Volume 3, Book 12, Hadith 1317 (DarusSalam) ⓘ

Narrated Abu Hurairah: "A man behaved in a rude manner while trying to collect a debt from the Messenger of Allah. So his Companions were about to harm him. The Messenger of Allah said: 'Leave him, for indeed the owner of the the right has the right to speak.' Then he said: 'Purchase a camel for him and give it to him.' So they searched out but they did not find a camel but of a better ager than his camel. So he said: 'Buy it and give it to him. For indeed the best of you is the best in repaying.'"

حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا وَهْبُ بْنُ جَرِيرٍ، حَدَّثَنَا شُعْبَةُ، عَنْ سَلَمَةَ بْنِ كُهَيْلٍ، عَنْ أَبِي سَلَمَةَ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَجُلاً، تَقَاضَى رَسُولَ اللَّهِ صلى الله عليه وسلم فَأَغْلَظَ لَهُ فَهَمَّ بِهِ أَصْحَابُهُ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ دَعُوهُ فَإِنَّ لِصَاحِبِ الْحَقِّ مَقَالاً ‏"‏ ثُمَّ قَالَ ‏"‏ اشْتَرُوا لَهُ بَعِيرًا فَأَعْطُوهُ إِيَّاهُ ‏"‏ ‏.‏ فَطَلَبُوهُ فَلَمْ يَجِدُوا إِلاَّ سِنًّا أَفْضَلَ مِنْ سِنِّهِ ‏.‏ فَقَالَ ‏"‏ اشْتَرُوهُ فَأَعْطُوهُ إِيَّاهُ فَإِنَّ خَيْرَكُمْ أَحْسَنُكُمْ قَضَاءً ‏"‏ ‏.‏

Another chain of narration with similar meaning. [Abu 'Eisa said: ] This Hadith is Hasan Sahih.

حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنْ سَلَمَةَ بْنِ كُهَيْلٍ، نَحْوَهُ ‏.‏ قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ ‏.‏