Hadith.665 - Imam Jafar ibn Muhammad Al-Sadiq عليه السلام said:
"Whoever prays Maghrib and then follows it immediately with the post-prayer (Ta'qeeb) supplication without speaking, and performs two units of prayer (Rak'ahs), they are recorded for him among those in 'Illiyyīn (the highest rank in Paradise). If he prays four units (Rak'ahs), it will be written for him as an accepted pilgrimage (Hajj Mabroor)."
The time of Fajr is when the light of dawn spreads and becomes visible, illuminating the sky such that it appears like the fabric of qibatis (a thin, white cloth) or like the River of Surā’ (a bright river).
Whoever prays the morning prayer at its earliest time will have it recorded twice — once by the angels of the night and once by the angels of the day. Whoever prays it at its later time will have it recorded once. Allah سبحانه وتعالى, Exalted and Glorious, says:
'Establish the prayer at the decline of the sun until the darkness of the night, and the recitation of the dawn. Verily, the recitation of the dawn is witnessed' (Qur'an 17:78), meaning that it is witnessed by both the angels of the night and the angels of the day.