وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ، قَالَ لاَ تَبِيعُوا الذَّهَبَ بِالذَّهَبِ إِلاَّ مِثْلاً بِمِثْلٍ وَلاَ تُشِفُّوا بَعْضَهَا عَلَى بَعْضٍ وَلاَ تَبِيعُوا الْوَرِقَ بِالْوَرِقِ إِلاَّ مِثْلاً بِمِثْلٍ وَلاَ تُشِفُّوا بَعْضَهَا عَلَى بَعْضٍ وَلاَ تَبِيعُوا شَيْئًا مِنْهَا غَائِبًا بِنَاجِزٍ . وَإِنِ اسْتَنْظَرَكَ إِلَى أَنْ يَلِجَ بَيْتَهُ فَلاَ تُنْظِرْهُ إِنِّي أَخَافُ عَلَيْكُمُ الرَّمَاءَ وَالرَّمَاءُ هُوَ الرِّبَا .
Yahya related to me from Malik from Abdullah ibn Dinar fromAbdullah ibn Umar that Umar ibn al-Khattab said, "Do not sell gold forgold except like for like. Do not increase part of it over anotherpart. Do not sell silver for silver except like for like, and do notincrease part of it over another part. Do not sell some of it which isthere for some of it which is not. If someone asks you to wait forpayment until he has been to his house, do not leave him. I fear ramafor you." Rama is usury. Translation Not Available
Book Ref: Muwatta Imam Malik Book 31 Hadith 1326
Web Ref: Muwatta Imam Malik Book 31 Hadith 35