The Messenger of Allah ﷺ borrowed a young camel, and when the camels of the sadaqah (alms) came to him, he ordered me to pay the man his young camel. I said: I find only an excellent camel in its seventh year. So the Prophet ﷺ said: Give it to him, for the best person is he who discharges his debt in the best manner.  

اسْتَسْلَفَ رَسُولُ اللَّهِ ﷺ بَكْرًا فَجَاءَتْهُ إِبِلٌ مِنَ الصَّدَقَةِ فَأَمَرَنِي أَنْ أَقْضِيَ الرَّجُلَ بَكْرَهُ فَقُلْتُ لَمْ أَجِدْ فِي الإِبِلِ إِلاَّ جَمَلاً خِيَارًا رَبَاعِيًّا فَقَالَ النَّبِيُّ ﷺ أَعْطِهِ إِيَّاهُ فَإِنَّ خِيَارَ النَّاسِ أَحْسَنُهُمْ قَضَاءً  

The Prophet ﷺ owed me a debt and gave me something extra when he paid it.  

كَانَ لِي عَلَى النَّبِيِّ ﷺ دَيْنٌ فَقَضَانِي وَزَادَنِي