قَالَ مَالِك فِي الرَّجُلِ يَكُونُ لَهُ عَلَى الرَّجُلِ مِائَةُ دِينَارٍ إِلَى أَجَلٍ، فَإِذَا حَلَّتْ، قَالَ لَهُ الَّذِي عَلَيْهِ الدَّيْنُ : بِعْنِي سِلْعَةً يَكُونُ ثَمَنُهَا مِائَةَ دِينَارٍ نَقْدًا بِمِائَةٍ وَخَمْسِينَ إِلَى أَجَلٍ : هَذَا بَيْعٌ لَا يَصْلُحُ، وَلَمْ يَزَلْ أَهْلُ الْعِلْمِ يَنْهَوْنَ عَنْهُ
Imam Malik, may Allah have mercy on him, said that if a person owes another person one hundred dinars on a fixed term, and when the term passes, the debtor says to the creditor: "Sell me something worth one hundred dinars for one hundred and fifty dinars on a deferred term," this sale is not valid, and the people of knowledge have always prohibited this.