Sahih al-Bukhari, Volume 3, Book 41, Hadith 577 (USC-MSA) ⓘ
Narrated Abu Huraira: A man came to the Prophet and demanded a camel (the Prophet owed him). Allah's Messenger told his companions to give him (a camel). They said, "We do not find except an older camel (than what he demands). (The Prophet ordered them to give him that camel). The man said, "You have paid me in full and may Allah also pay you in full." Allah's Messenger said, "Give him, for the best amongst the people is he who repays his debts in the most handsome manner."
حَدَّثَنَا مُسَدَّدٌ، عَنْ يَحْيَى، عَنْ سُفْيَانَ، قَالَ حَدَّثَنِي سَلَمَةُ بْنُ كُهَيْلٍ، عَنْ أَبِي سَلَمَةَ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ أَنَّ رَجُلاً، أَتَى النَّبِيَّ صلى الله عليه وسلم يَتَقَاضَاهُ بَعِيرًا، فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " أَعْطُوهُ ". فَقَالُوا مَا نَجِدُ إِلاَّ سِنًّا أَفْضَلَ مِنْ سِنِّهِ. فَقَالَ الرَّجُلُ أَوْفَيْتَنِي أَوْفَاكَ اللَّهُ. فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " أَعْطُوهُ فَإِنَّ مِنْ خِيَارِ النَّاسِ أَحْسَنَهُمْ قَضَاءً ".
also referenced under: Book 43, Hadith 8 (In-Book) & Hadith 2392 (DarusSalam)