1.41: Narrated `Aisha: Once the Prophet came while a woman was sitting with me. He said, "Who is she?" I replied, "She is so and so," and told him about her (excessive) praying. He said disapprovingly, "Do (good) deeds which is within your capacity (without overtaxing yourself) as Allah does not get tired (of giving rewards) but (surely) you will get tired; the best deed (act of Worship) in the sight of Allah is that which is done regularly." - OWN ISLAM -

1.41:
Narrated `Aisha:
Once the Prophet came while a woman was sitting with me. He
said, "Who is she?" I replied, "She is so and so," and told
him about her (excessive) praying. He said disapprovingly, "Do
(good) deeds which is within your capacity (without overtaxing
yourself) as Allah does not get tired (of giving rewards) but
(surely) you will get tired; the best deed (act of Worship) in
the sight of Allah is that which is done regularly."