The Source of Traditions on Imam al-Riḍā (Vol 2) · Hadith 347 (#Ḥadīth #347)
Chapter 1 | Traditions about Ar-Ridha
347 - وَبِهذَا الإسناد قالَ: قالَ رَسُولَ اللَّهِ صَلَّى اللهُ عَلَيْهِ وَآلِهِ: أَنَا خاتَم النَبِيِّين وَعَلِيِّ خاتَم الوَصِيِّين.
31-347 According to the same documentation, God’s Prophet (S) said, “I am the seal of the Prophets and Ali is the seal of the Trustees.”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).