receive the reward
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1 To receive the reward of spending half the night in prayer
It was narrated from `Uthman bin `Affan ( may Allah be pleased with him ) said:
the Prophet ( may the peace and blessings of Allah be upon him ) said: `Whoever prays `Isha` and Fajr prayer in congregation, it is as if he spent the night in prayer (qiyamul-lail).” ‘Abdur-Rahman said: Whoever prays `Isha` in the congregation, it is as if he spent half the night in prayer, and whoever prays Fajr in the congregation, it is as if he spent the entire night in prayer.
[ Muslim ]