Muwatta Malik· موطأ مالك
Muwatta Malik 589
Trade with the property of orphans and then it will not be eaten away by zakat
মুয়াত্তা ইমাম মালিক ৫৮৯ · মুয়াত্তা মালিক•Zakat
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ عُمَرَ بْنَ الْخَطَّابِ، قَالَ اتَّجِرُوا فِي أَمْوَالِ الْيَتَامَى لاَ تَأْكُلُهَا الزَّكَاةُ .
Narrator: Yahya
Yahya related to me from Malik that he had heard that Umar ibn al-Khattab said, "Trade with the property of orphans and then it will not be eaten away by zakat- Salim al-HilaliMauquf Sahih