The rise of al-Mahdi with Divine Authority earlier or later will not affect one who has learned who his Imam is

3. Ali ibn Muhammad has narrated from in a Murfu‘ manner from Ali ibn Hamza from abu Basir who said: “I said to abu ‘Abdallah عليه السلام, “May Allah take my soul in service for your cause, when will the relief come?” The Imam عليه السلام said, “O abu Basir, are you after the worldly gains? In fact, one who has established faith in this matter (the rise of al-Mahdi with Divine Authority) he has already experienced relief of expecting his (coming with Divine Authority).”