The Peak of Eloquence · Hadith 1840 (#Passage #199)

١٥٤. وَقَالَ (عليه السلام): الرَّاضِي بِفِعْلِ قَوْمٍ كَالدَّاخِلِ فِيهِ مَعَهُمْ، وَعَلَى كُلِّ دَاخِلٍ فِي بَاطِلٍ إِثْمَانِ: إِثْمُ الْعَمَلِ بِهِ، وَإِثْمُ الرِّضَى بِهِ.

154. Amīr al-mu’minīn, peace be upon him, said: He who agrees with the action of a group of persons is as though he joins them in that action. And every one who joins in wrong commits two sins; one sin for committing the wrong and the other for agreeing with it.

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