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

5. A number of our people has narrated from Ahmad ibn Muhammad from Ali ibn al-Ni‘man from Muhammad ibn Marwan from al-Fudayl ibn Yasar who has said the following. “I heard abu ‘Abdallah عليه السلام say, ‘One who would die without having an Imam his death would like the death of ignorance. One who would die and would know who his Imam is then the coming of this matter (the rise of al-Mahdi with Divine Authority) earlier or later will not affect him at all. One who would knowing who his Imam is he would be like the one present with Al-Qa’im in his tents.”