The first day of Ramadhan
On the authority of Abu Saeed al Khudri (May Allah be pleased with him) it is related that the Prophet (Peace be upon him) said,
“The doors of Jannah (Paradise) are opened up on the first night of Ramadhan. Not a single door (among the doors of paradise) is then closed until the last night of Ramadhan.
For every Salah (prayer) performed (this refers to Taraweeh salah) during the nights of Ramadhan; Allah (swt) records one and a half thousand good deeds for every Sajdah (Prostration of that Salah), And, for the fasting person, Allah (swt) creates in Jannah a mansion of red Ya’qoot (a precious stone in Jannah).
This mansion will have seven thousand entrances. (So huge will be these entrances that, in each entrance will be located a palace of gold adorned with red Ya’qoot).
When the Muslim fasts the first day of Ramadhan, Allah (swt) forgives all his sins committed from the first of the previous Ramadhan. Daily (i.e. during Ramadhan) from the time of Fajr salah until sunset, seventy thousand Malaaikah (angels) supplicate for his forgiveness.
In return for every sajdah (prostration) which he (the fasting person) makes of any Salah, whether during the day or night, he will obtain (such a wonderful) tree (so huge) that a horseman will take five hundred years to pass under its shade.”
[Baihaqi]
Wassalam...