Al-Kāfi - Volume 6 > Mixing of Dead Animals with Slaughtered Clean
Hadith #2

مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ عَلِيِّ بْنِ الْحَكَمِ عَنْ أَبِي الْمَغْرَاءِ عَنِ الْحَلَبِيِّ قَالَ سَمِعْتُ أَبَا عَبْدِ اللَّهِ ( عليه السلام ) يَقُولُ إِذَا اخْتَلَطَ الذَّكِيُّ وَ الْمَيْتَةُ بَاعَهُ مِمَّنْ يَسْتَحِلُّ الْمَيْتَةَ وَ يَأْكُلُ ثَمَنَهُ .

2. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Ali ibn al-Hakam from abu al-Mighra’ from al-Halabiy who has said the following: “I once heard abu ‘Abd Allah, ‘Alayhi al-Salam, saying, ‘If clean (properly slaughtered) become mixed with the dead ones, one can sell them to one who considers dead animals as lawful and use the payment that one receives.’”