Messenger of Allah ﷺ took a camel on loan, and then returned him (the lender) the camel of a more mature age and said: Good among you are those who are good in clearing off the debt.
اسْتَقْرَضَ رَسُولُ اللَّهِ ﷺ سِنًّا فَأَعْطَى سِنًّا فَوْقَهُ وَقَالَ خِيَارُكُمْ مَحَاسِنُكُمْ قَضَاءً
"The Messenger of Allah ﷺ took a camel of a particular age on loan. He gave back to him a camel of a better age than the one he was given. He said: 'The best among you is the best in repaying.'" He said: There is something on this topic from Abu Rafi'.
اسْتَقْرَضَ رَسُولُ اللَّهِ ﷺ سِنًّا فَأَعْطَاهُ سِنًّا خَيْرًا مِنْ سِنِّهِ وَقَالَ خِيَارُكُمْ أَحَاسِنُكُمْ قَضَاءً قَالَ وَفِي الْبَابِ عَنْ أَبِي رَافِعٍ