The Source of Traditions on Imam al-Riḍā (Vol 2) · Hadith 322 (#Ḥadīth #322)

322 - وَبِإِسْنادِهِ قالَ: قالَ رَسُولَ اللَّهِ صَلَّى اللهُ عَلَيْهِوَآلِهِ: ما أخلص عَبْد لِلَّهِ عَزَّ وَجَلَّ أَرْبَعِينَ صباحا إلا جرت ينابيع الحكمة من قَلْبِهِ عَلَى لِسانِهِ.

31-322 According to the same documentation, God’s Prophet (S) said, “Whenever one of the servants of God spends forty days in sincerity, springs of wisdom will flow from of his tongue.”

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