ʿUyūn akhbār al-Riḍā
Hadith 305305 - وَبِإِسْنادِهِ قالَ: قالَ النَّبِيُ صَلَّى اللهُ عَلَيْهِوَآلِهِ: كُفَّ عَلِيٍّ كَفِّي.
31-305 According to the same documentation,the Prophet (S) said, “Ali’s hand is the same as my hand.”