that the Messenger of Allah said: "It is not permissible to lend on the condition of a sale, or to have two conditions in one transaction, or to sell what you do not have." (Sahih  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ يَحِلُّ سَلَفٌ وَبَيْعٌ وَلاَ شَرْطَانِ فِي بَيْعٍ وَلاَ بَيْعُ مَا لَيْسَ عِنْدَكَ  

"The Messenger of Allah said: 'No man is bound by a transaction involving the sale of something that he does not possess.'''  

قَالَ رَسُولُ اللَّهِ ﷺ لَيْسَ عَلَى رَجُلٍ بَيْعٌ فِيمَا لاَ يَمْلِكُ  

"I asked the Prophet "O Messenger of Allah, a man may come to me and ask me to sell him something that I do not have. Can I sell it to him then go and buy it from the market?' He said: 'Do not sell what you do not have.'''  

سَأَلْتُ النَّبِيَّ ﷺ فَقُلْتُ يَا رَسُولَ اللَّهِ يَأْتِينِي الرَّجُلُ فَيَسْأَلُنِي الْبَيْعَ لَيْسَ عِنْدِي أَبِيعُهُ مِنْهُ ثُمَّ أَبْتَاعُهُ لَهُ مِنَ السُّوقِ قَالَ لاَ تَبِعْ مَا لَيْسَ عِنْدَكَ