سورة السجدة

Imam Sadiq (peace be upon him): Hafs ibn Ghiyath said: Imam Sadiq (peace be upon him) said: Before they take account of you [on the Day of Judgement], take account of yourselves [in this very world], for on the Day of Judgement there are fifty stopping-places, and the halt at each one [for reckoning] lasts a thousand years; then the Imam (peace be upon him) recited this verse: فِی یَوْمٍ کانَ مِقْدارُهُ أَلْفَ سَنَةٍ مِمَّا تَعُدُّونَ [in a day the measure of which is a thousand years of what you count].

Ali ibn Ibrahim (may Allah have mercy on him): یُدَبِّرُ الْأَمْرَ مِنَ السَّماءِ إِلَی الْأَرْضِ ثُمَّ یَعْرُجُ إِلَیْهِ [He regulates the affair from the heaven to the earth; then shall it ascend to Him]; that is, the affairs which Allah manages, the commands and prohibitions which He has ordered, and the deeds of the servants — He will make all of them manifest on the Day of Judgement. Therefore the measure of that day equals a thousand years of the years of this world.

Ibn Abbas (may Allah have mercy on him): "In a day the measure of which is fifty thousand years" (Ma'arij/4) — the distance between the furthest reach of His command in the lowest of the earths and the furthest reach of His command above the seven heavens is fifty thousand years. And یَوْمٍ کانَ مِقْدارُهُ أَلْفَ سَنَةٍ [a day the measure of which is a thousand years] means that He sends His command from the heaven to the earth and from there back to the heaven in a single day, the measure of that day being a thousand years [of the years of this world]; for the distance between the heaven and the earth is a journey of five hundred years.