Sahih Bukhari

Narrated 'Aisha: A woman from the tribe of Bani Asad was sitting with me and Allah's Apostle (ﷺ) came to my house and said, ""Who is this?"" I said, ""(She is) So and so. She does not sleep at night because she is engaged in prayer."" The Prophet (ﷺ) said disapprovingly: Do (good) deeds which is within your capacity as Allah never gets tired of giving rewards till you get tired of doing good deeds