The Source of Traditions on Imam al-Riḍā (Vol 2) · Hadith 131 (#Ḥadīth #131)

131 - وَبِهذَا الإِسنادِ عَنْ عَلِىِّ بْنِ أَبِي طالِبٍ عَلَيْهِالسَّلامُ قالَ: كانَ النَّبِيُ صَلَّى اللهُ عَلَيْهِ وَآلِهِ لا يَأْكُلُ الكُلّيَتَيْنِ مِن غَيْرِ أَن يُحَرِمَّهُما لِقُربِهِما مِن البُوْلِ.

31-131 According to the same documentation, Ali ibn Abi Talib said, “The Prophet (S) never forbade eating kidneys, but he wouldn’t eat them. The Prophet (S) said it was because they produce urine.”

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