Last Night of Ramaḍān
The following ‘amaal is to be done on either the 29th or 30th of Ramaḍān (whichever date is the last date of Ramaḍān in your region).
I visited the Messenger of Allah (a.s.) on the last Friday of Ramaḍān. As he saw me, he said: O Jabir, this is the last Friday of Ramaḍān. You should thus bid farewell to it by saying the following:
Verily, whoever says this supplication will win one of the two good things; either attaining the next Ramaḍān or having the forgiveness and mercy of Almighty Allah.
After each couple of units, one may recite the tashahhud and taslim. After the completion of the ten units, one may recite the taslim and repeat istigfar 1000 times.
After that, one may prostrate and recite the following:
The Holy Prophet (s) then continues, “I swear by Him Who has sent me with the truth as prophet, Archangel Gabriel has reported to me from Archangel Seraph who directly reports from Almighty Allah that one who offers that prayer will not raise his head from prostration before Almighty Allah forgives him, accepts his acts during the month of Ramaḍān, and overlooks his sins... etc.”
It is worth mentioning that other narrations have confirmed that this prayer is offered on the Night of ‘Id al-Fitr (i.e. the first night of Shawwal) with a little difference in the form of the supplication.