"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'. [Abu 'Eisa said:] The Hadith of Abu Hurairah is a Hasan Sahih Hadith. Shu'bah and Sufyan reported it from Salamah. This is acted upon according to some of the people of knowledge, they saw no harm is taking a camel of a particular age as a loan. This is the view of Ash-Shafi'i, Ahmad, and Ishaq. But some of them disliked that.
حَدَّثَنَا أَبُو كُرَيْبٍ، حَدَّثَنَا وَكِيعٌ، عَنْ عَلِيِّ بْنِ صَالِحٍ، عَنْ سَلَمَةَ بْنِ كُهَيْلٍ، عَنْ أَبِي سَلَمَةَ، عَنْ أَبِي هُرَيْرَةَ، قَالَ اسْتَقْرَضَ رَسُولُ اللَّهِ صلى الله عليه وسلم سِنًّا فَأَعْطَاهُ سِنًّا خَيْرًا مِنْ سِنِّهِ وَقَالَ خِيَارُكُمْ أَحَاسِنُكُمْ قَضَاءً . قَالَ وَفِي الْبَابِ عَنْ أَبِي رَافِعٍ . قَالَ أَبُو عِيسَى حَدِيثُ أَبِي هُرَيْرَةَ حَدِيثٌ حَسَنٌ صَحِيحٌ . وَقَدْ رَوَاهُ شُعْبَةُ وَسُفْيَانُ عَنْ سَلَمَةَ . وَالْعَمَلُ عَلَى هَذَا عِنْدَ بَعْضِ أَهْلِ الْعِلْمِ لَمْ يَرَوْا بِاسْتِقْرَاضِ السِّنِّ بَأْسًا مِنَ الإِبِلِ . وَهُوَ قَوْلُ الشَّافِعِيِّ وَأَحْمَدَ وَإِسْحَاقَ . وَكَرِهَ بَعْضُهُمْ ذَلِكَ .
Tirmizi
The Book on Business • Hadith 1326