[Machine] O Messenger of Allah, we hear from you narrations. Can we write them down? He said, "Yes." So, the first thing that was written was the book of the Prophet ﷺ to the people of Makkah: it is not permissible to have two conditions in one sale, nor a sale and a loan altogether, nor a sale of something that is not guaranteed. And whoever owes a hundred dirhams, he should repay them except for ten dirhams, then he is a slave, or on a hundred and ten dirhams, he should repay them except for two dirhams, then he is a slave.
يَا رَسُولَ اللهِ إِنَّا نَسْمَعُ مِنْكَ أَحَادِيثًا أَفَتَأْذَنُ لَنَا أَنْ نَكْتُبَهَا؟ قَالَ «نَعَمْ» فَكَانَ أَوَّلَ مَا كُتِبَ كِتَابُ النَّبِيِّ ﷺ إِلَى أَهْلِ مَكَّةَ لَا يَجُوزُ شَرْطَانِ فِي بَيْعٍ وَاحِدٍ وَلَا بَيْعٍ وَسَلَفٍ جَمِيعًا وَلَا بَيْعِ مَا لَمْ يُضْمَنْ وَمَنْ كَانَ مُكَاتَبًا عَلَى مِائَةِ دِرْهَمٍ فَقَضَاهَا إِلَّا عَشَرَةَ دَرَاهِمَ فَهُوَ عَبْدٌ أَوْ عَلَى مِائَةِ وَقِيَّةٍ فَقَضَاهَا إِلَّا أُوقِيَّتَيْنِ فَهُوَ عَبْدٌ