It is narrated from Sayyidah Aishah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) said: "Indeed, a man attains, through his good character, the ranks of one who stands in prayer by night and fasts by day." This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it, and it has a sahih supporting report (shahid) on the condition of Muslim as well.

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Indeed, Allah Almighty raises a servant, because of his good character, to the rank of one who (voluntarily) fasts and (voluntarily) prays."