al-Sharif al-Radi (d. 406 AH) · Thaqalayn library edition, reproduced verbatim
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.
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