Al-Kāfi - Volume 7 > One Who Issues Fatwa is Responsible
Hadith #1

1- عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ عَبْدِ الرَّحْمَنِ بْنِ الْحَجَّاجِ قَالَ كَانَ أَبُو عَبْدِ اللهِ (عَلَيْهِ السَّلام) قَاعِداً فِي حَلْقَةِ رَبِيعَةِ الرَّأْيِ فَجَاءَ أَعْرَابِيٌّ فَسَأَلَ رَبِيعَةَ الرَّأْيِ عَنْ مَسْأَلَةٍ فَأَجَابَهُ فَلَمَّا سَكَتَ قَالَ لَهُ الأعْرَابِيُّ أَهُوَ فِي عُنُقِكَ فَسَكَتَ عَنْهُ رَبِيعَةُ وَلَمْ يَرُدَّ عَلَيْهِ شَيْئاً فَأَعَادَ عَلَيْهِ الْمَسْأَلَةَ فَأَجَابَهُ بِمِثْلِ ذَلِكَ فَقَالَ لَهُ الأعْرَابِيُّ أَهُوَ فِي عُنُقِكَ فَسَكَتَ رَبِيعَةُ فَقَالَ لَهُ أَبُو عَبْدِ اللهِ (عَلَيْهِ السَّلام) هُوَ فِي عُنُقِهِ قَالَ أَوْ لَمْ يَقُلْ وَكُلُّ مُفْتٍ ضَامِنٌ.

1. Ali ibn Ibrahim has narrated from his father from ibn abu ‘Umayr from ‘ Abd al- Rahman ibn al-Hajjaj who has narrated the following: “Once abu ‘Abd Allah, ‘Alayhi al-Salam, was in the group of the circle of Rabi‘ah al-Ra’y when an Arab man came and asked Rabi‘ah al-Ra’iy a question and he replied. When he became quiet the Arab man asked, ‘Do you take responsibility for your answer?’ He remained quiet and did not respond. He repeated the question and he gave a similar answer and the Arab man asked, ‘Do you take the responsibility? But Rabi‘ah al-Ra’y remained quiet. Abu ‘Abd Allah, ‘Alayhi al-Salam, said to him that it is his responsibility. He said, ‘Has He not said that everyone who issues a Fatwa is responsible for it?”’