1. My father, may Allah grant him mercy, said: We were told by Sa’d bin Abdullah, from Ya’qoub bin Yazid, from Ja’far bin Muhammed bin ‘Uqba, from the one he narrated, from Abu Abdillah, peace be upon him, with regards to the saying of Allah, Exalted and Glorious is He: «Dwelling in it for epochs» (78:24). He said
The epochs are eight epochs, and one epoch is (consisting of) eighty years, and one year is three hundred and sixty days, and one day is like a thousand years of what you count.