Al-Kāfi - Volume 4 > The Least That Is Enough for a Sacrifice
Hadith #2

2ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ وَمُحَمَّدُ بْنُ إِسْمَاعِيلَ عَنِ الْفَضْلِ بْنِ شَاذَانَ عَنْ صَفْوَانَ بْنِ يَحْيَى وَابْنِ أَبِي عُمَيْرٍ عَنْ مُعَاوِيَةَ بْنِ عَمَّارٍ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) قَالَ يُجْزِئُ فِي الْمُتْعَةِ شَاةٌ.

2. Ali ibn Ibrahim has narrated from his father from ibn abu ‘Umayr from Ahmad ibn Muhammad from Muhammad ibn ‘Isma‘il has narrated from al-Fadl ibn Shadhan from Safwan ibn Yahya and ibn abu ‘Umayr from Mu‘awiyah ibn ‘Ammar who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said, ‘For al-Hajj al-Tamattu‘ (advantageous) one sheep is sufficient.’”