Hadith
حَدَّثَنَا زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا إِسْمَاعِيلُ، عَنْ أَيُّوبَ، حَدَّثَنِي عَمْرُو بْنُ شُعَيْبٍ، حَدَّثَنِي أَبِي، عَنْ أَبِيهِ، عَنْ أَبِيهِ، حَتَّى ذَكَرَ عَبْدَ اللَّهِ بْنَ عَمْرٍو قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " لاَ يَحِلُّ سَلَفٌ وَبَيْعٌ وَلاَ شَرْطَانِ فِي بَيْعٍ وَلاَ رِبْحُ مَا لَمْ تَضْمَنْ وَلاَ بَيْعُ مَا لَيْسَ عِنْدَكَ " .
Narrated 'Amr b. Suh'aib: On his father's authority, said that his grandfather 'Abd Allah b. 'Amr reported the Messenger of Allah (ﷺ) as saying: The proviso of a loan combined with a sale is not allowable, nor two conditions relating to one transaction, nor profit arising from something which is not in one's charge, nor selling what is not in your possession
Sahih · Al-Albani
Sunan Abi Dawud 3504 ·Book 24, Hadith 89·Also available on sunnah.com·