From his will to Muhammad ibn al-Hanafiyya, on leaving Medina
وأنّي لَم أخرُج أشِراً ولا بَطِراً ولا مُفسِداً ولا ظالِماً، وإنَّما خَرَجتُ لِطَلَبِ الإِصلاحِ في امَّةِ جَدّي صلى الله عليه وآله، أريدُ أن آمُرَ بِالمَعروفِ وأنهى عَنِ المُنكَرِ، وأسيرَ بِسيرَةِ جَدّي مُحَمَّدٍ صلى الله عليه وآله وأبي عَلِيِّ بنِ أبي طالِبٍ عليه السلامReference: Tasliyat al-majalis, vol. 2, p. 160; also Ibn A‘tham, al-Futuh, vol. 5, p. 21; al-Khwarazmi, Maqtal al-Husayn, vol. 1, p. 273; Bihar al-anwar, vol. 44, pp. 329–330 [WikiShia] [ʿAllāma Muḥammad Bāqir al-…]
Arabic as quoted in the cited reference work.
He declares that he is not setting out from arrogance, ambition, corruption or oppression, but only to seek reform in his grandfather’s community: to enjoin good, forbid wrong, and follow the way of the Prophet (s) and of his father Ali (AS).
WikiShia notes that some historians, such as Rasul Ja‘fariyan, question the chain, since al-Futuh gives no isnad. Some versions in Ibn A‘tham and al-Khwarazmi add “and the rightly guided caliphs”; the researcher al-‘Askari regards that phrase as a later addition. We give the text as quoted from Tasliyat al-majalis.