The Source of Traditions on Imam al-Riḍā (Vol 2) · Hadith 247 (#Ḥadīth #247)

247 - وَبِإِسْنادِهِ عَنِ النَّبِيُ صَلَّى اللهُ عَلَيْهِ وَآلِهِأَنَّهُ قالَ: خَيْرُ إِخْوانِي عَلِيٌّ، وَخَيْرُ أَعْمامِي حَمْزَةُ، وَالعَبَّاسُ صِنُوا أَبي.

31-247 According to the same documentation, the Prophet (S) said, “Ali is my best brother, and Hamza and Abbas are my best uncles.”

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).