It was narrated from 'Aishah that: The Prophet [SAW] entered upon her and there was a woman with her. He said: "Who is this?" She said: "So-and-so; she does not sleep"- she mentioned her excessive praying. The Prophet [SAW] said: "Keep quiet. You should do what you are able to, for by Allah, Allah, the Mighty and Sublime, does not get tired. The most beloved religion to Him is that in which a person persists."