Instructions for Hasan, when returning from Siffin
Nahj al-Balāgha|Volume 1|Book 2|Chapter 31
وَاعْلَمْ يَا بُنَيَّ أَنَّ أَحَداً لَمْ يُنْبِئْ عَنِ اللهِ سُبْحَانَهُ كَمَا أَنْبَأَ عَنْهُ الرَّسُولُ (صَلَّى اللهُ عَلَيْهِ وَآلِهِ) فَارْضَ بِهِ رَائِداً، وَإِلَى النَّجَاةِ قَائِداً، فَإِنِّي لَمْ آلُكَ نَصِيحَةً. وَإِنَّكَ لَنْ تَبْلُغَ فِي النَّظَرِ لِنَفْسِكَ وَإِنِ اجْتَهَدْتَ مَبْلَغَ نَظَرِي لَكَ.
Know O’ my child, that no one received messages from Allāh, the Glorified, as the Prophet (may Allāh bless him and his progeny) did. Therefore, regard him as your forerunner and leader towards deliverance. Certainly, I shall spare no effort in giving you advice and surely even if you try, you cannot acquire that insight for your welfare as I have for you.