The Source of Traditions on Imam al-Riḍā (Vol 2) · Hadith 160 (#Ḥadīth #160)

160 - وَبِهذَا الإِسناد عَنْ جَعْفَرِ بْنِ مُحَمَّد a.sُأَنَّهُ قالَ: أَدنِى العُقُوق أُفٍّ وَلَوْ عَلِمَ اللَّه شَيئاً أَهوَنَ مِنَ الأُفِّ لَنَهى عَنْهُ.

31-160 According to the same documentation, it is narrated that Ja’far ibn Muhammad said, “The lowest level of being damned by parents is through telling them a word of contempt. If God knew anything lower than this, He would have admonished us against it.”

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