The Source of Traditions on Imam al-Riḍā (Vol 2) · Hadith 98 (#Ḥadīth #98)

98 - وَبِهذَا الإِسنادِ قالَ: قالَ رَسُولُ اللَّهِ صَلَّى اللهُعَلَيْهِ وَآلِهِ: ما مِن شَيءِ أَثقَلُ فِي المِيزانِ مِن حُسنِ الخُلقِ.

31-98 According to the same documentation, God’s Prophet (S) said, “Nothing weighs more on the Scale than a good temper.”

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