al-Sharif al-Radi (d. 406 AH) · Thaqalayn library edition, reproduced verbatim
وَالْوَاجِبُ عَلَيْكَ أَنْ تَتَذَكَّرَ مَا مَضَى لِمَنْ تَقَدَّمَكَ: مِنْ حُكُومَةٍ عَادِلَةٍ، أَوْ سُنَّةٍ فَاضِلَةٍ، أَوْ أَثَرٍ عَنْ نَبِيِّنَا (صلى الله عليه وآله) أَوْ فَرِيضَةٍ فِي كِتَابِ اللهِ، فَتَقْتَدِيَ بِمَا شَاهَدْتَ مِمَّا عَمِلْنَا بِهِ فِيهَا، وَتَجْتَهِدَ لِنَفْسِكَ فِي اتِّبَاعِ مَا عَهِدْتُ إِلَيْكَ فِي عَهْدِي هَذَا، وَاسْتَوْثَقْتُ بِهِ مِنَ الْحُجَّةِ لِنَفْسِي عَلَيْكَ، لِكَيْلَا تَكُونَ لَكَ عِلَّةٌ عِنْدَ تَسَرُّعِ نَفْسِكَ إِلَى هَوَاهَا.
It is necessary for you to recall how matters went with those who preceded you, be it a government or a great tradition or a precedent of our Prophet (may Allāh bless him and his descendants) or the obligatory commands contained in the Book of Allāh. Then you should follow them as you have seen us acting upon them and should exert yourself in following that I have enjoined upon you in this document in which I have exhausted my pleas on you, so that if your heart advances towards its passions you may have no plea in its support.
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