If he remains in occultation equal to the time Noah remained in his nation...

If he remains in occultation equal to the time Noah remained in his nation, he will not depart the world until he appears and fills the earth with fairness and justice just as it will be filled with injustice and unfairness.” Kamāl al-dīn[^7]: Narrated to us Aḥmad b. Muḥammad b. Yaḥyā al-`Aṭṭār, may Allah be satisfied with him, from his father, from Ibrāhīm b. Hāshim, from Muḥammad b. Abī `Umair, from Ṣafwān b. Mihrān al-Jammāl, from al-Ṣādiq, Ja`far b.

Muḥammad, peace be on him, who said: “By Allah, your Mahdī will become hidden from you to the extent that the ignorant from amongst you will say, ‘The family of Muḥammad are unimportant for Allah.’ Then, he will come like a shining meteor and will fill [earth] with justice and fairness just as it will be filled with injustice and unfairness.” Al-Kāfī[^8]: `Alī b. Muḥammad, from Ja`far b. Muḥ