The Source of Traditions on Imam al-Riḍā (Vol 2) · Hadith 92 (#Ḥadīth #92)

92 - وَبِهذَا الإِسنادِ قالَ: قالَ رَسُولُ اللَّهِ صَلَّى اللهُعَلَيْهِ وَآلِهِ: مَن صامَ يَوْمَ الجُمُعَةِ صبراً وَاحتِساباً اُعْطِيَ ثَوابَ صِيامِ عَشَرةِ أيَّامٍ غُرٍّ زُهرٍ، لا تُشاكِلُ أيَّامَ الدُّنيا.

31-92 According to the same documentation, God’s Prophet (S) said, “Whoever fasts on Fridays to strengthen his patience will be given the reward of ten bright days - days which do not look like this world’s days.”

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