In The Name of Allah, The Most Merciful, The Bestower of Mercy.

Ibn Sammaak [may Allah have mercy upon you] once said to Haaroon Ar-Rasheed [may Allah have mercy upon him]: “Indeed, you will die one day, enter the grave on your own and will be resurrected (on the day of judgement), so beware of your standing in the presence of Allah [The Mighty and Majestic] and in the presence of paradise and hellfire when one will be restricted and the feet will not move. There will be regret, but no repentance will be accepted – neither will a statement be uttered with ambiguity nor will wealth be accepted as ransom”. Haaroon began to weep until his voice could be heard; then Yahyah Bin Khaalid [may Allah have mercy upon him] said, “O Ibn As-Sammaak! Indeed, tonight you have brought difficulty on the leader of the believers”. Haaroon got up and left while weeping.

Al-Bidaayah Wan-Nihaayah. Vol 10. Pages 213-217