Al-Kāfi

Hadith 134
wudu
8ـ وَعَنْهُ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ رِفَاعَةَ وَمُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ الْحَسَنِ بْنِ عَلِيٍّ عَنْ رِفَاعَةَ قَالَ سَأَلْتُ أَبَا عَبْدِ الله (عَلَيْهِ الْسَّلام) عَنِ الأقْطَعِ قَالَ يَغْسِلُ مَا قُطِعَ مِنْهُ.
8. It is a narration from him (narrator of the previous Hadith) by his father from Ibn Abi ‘Umayr from Rifa‘ah and Muhammad ibn Yahya from Ahmad ibn Muhammad from al-Hassan ibn Ali from Rifa‘ah, who has said the following: “I once asked abu ‘Abd Allah (a.s.), about a cut-off hand for Wudu’. He (the Imam) said, ‘One must wash the cut-off part.”’
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī