The Book of Occultation — al-Ṭūsī · Hadith 319 (#Ḥadīth #10)
Chapter 28 | Traditional reports that confirm the uprising of Imam Mahdi
139- عنه عن علي بن العباس المقانعي عن بكار بن أحمد عن مصبح عن قيس عن أبي حصين عن أبي صالح عن أبي هريرة قال: قال رسول الله صلى الله عليه وآله وسلم: لو لم يبق من الدنيا إلا يوم واحد لطول الله ذلك اليوم حتى يخرج رجلاً من أهل بيتي يملأ الأرض عدلاًكما ملئت ظلماً وجوراً.
H 139 - It is narrated from Ali bin Abbas Maqanai Bakkar bin Ahmad from Misbah from Qays from Abu Husain from Abu Salih from Abu Huraira that he said: The Messenger of Allah (s) said: If a single day remains from the tenure of the world, Allah, the Mighty and the High would prolong that day to such an extent that a man from my progeny will appear; he would fill the earth with justice and equity, just as it would have been fraught with injustice and oppression.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).