سنن النسائي

It was narrated that 'Aishah said: "The Messenger of Allah (ﷺ) had a mat which he would spread in the day and make into a small booth at night to pray in it. The people found out about that and they prayed when he prayed, with the mat in between him and them. He said: 'Do as much of good deeds as you can, for Allah does not get tired (of giving reward) until you get tired. And the most beloved of deeds to Allah are those that are continuous, even if they are few.' Then he stopped that prayer and did not return to it until Allah took him (in death), and if he started to do something he would persist in it."