It was narrated that Abu Hurairah said:
“The Messenger of Allah (peace be upon him) used to encourage (us) to pray Qiyam during Ramadan, without insisting on that, and he said: ‘Whoever spends the nights of Ramadan in prayer (Qiyam) out of faith and in the hope of reward, he will be forgiven his previous sins’
(Sunan an-Nasa’I, Vol. 3, Book 22, Hadith 109)
