The Source of Traditions on Imam al-Riḍā (Vol 2) · Hadith 187 (#Ḥadīth #187)

187 - وَبِهذَا الإسناد قالَ: قالَ رَسُولَ اللَّهِ صَلَّى اللهُعَلَيْهِ وَآلِهِ: يا عَلِيِّ لَولاكَ لَما عُرِفَ الْمُؤْمِنُوُنَ بَعْدي.

31-187 According to the same documentation, God’s Prophet (S) said, “O Ali! Were it not for your existence, the believers after me would not get recognized.”

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