Hadith 513890
Chapter 32: Qirad - كتاب القراض
وَحَدَّثَنِي مَالِكٌ، عَنِ الْعَلاَءِ بْنِ عَبْدِ الرَّحْمَنِ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، أَنَّ عُثْمَانَ بْنَ عَفَّانَ، أَعْطَاهُ مَالاً قِرَاضًا يَعْمَلُ فِيهِ عَلَى أَنَّ الرِّبْحَ بَيْنَهُمَا .
Malik related to me from al-Ala ibn Abd ar-Rahman from his father from his father that Uthman ibn Affan gave him some money as qirad to use provided the profit was shared between them.
Reference Muwatta Malik 513890
USC-MSA web (English) reference : Book 32, Hadith 2