Al-Kāfi - Volume 6 > Tools for Slaughtering
Hadith #1

عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ عُمَرَ بْنِ أُذَيْنَةَ عَنْ مُحَمَّدِ بْنِ مُسْلِمٍ قَالَ سَأَلْتُ أَبَا جَعْفَرٍ ( عليه السلام ) عَنِ الذَّبِيحَةِ بِاللِّيطَةِ وَ بِالْمَرْوَةِ فَقَالَ لَا ذَكَاةَ إِلَّا بِحَدِيدَةٍ .

1. Ali ibn Ibrahim has narrated from his father from ibn abu ‘Umayr from ‘Umar ibn ‘Udhaynah from Muhammad ibn Muslim who has said the following: “I once asked abu Ja‘far, ‘Alayhi al-Salam, if an animal can be slaughtered with a piece of sharp wood or stone. He (the Imam) said, ‘Without iron it is not a proper slaughtering.”’