It is narrated from Umm al-Mu'mineen Hazrat Aisha (may Allah be pleased with her) that a woman named "Hawla" used to come to her, who was famous for enduring hardship and exertion in worship. When I mentioned her to the Prophet (peace and blessings be upon him), the Prophet (peace and blessings be upon him) said: Do as much (good) deeds as you are able, for by Allah, Allah does not get tired, but you will surely get tired. The previous hadith is also narrated through this second chain.