A’isha said:
"Allah’s Messenger (Allah bless him and give him peace) entered my presence, and there was a woman with me, so he said: “Who is this?” I said: “So-and-so, who does not sleep at night.” Allah’s Messenger (Allah bless him and give him peace) then said: 'Incumbent upon you are the works of which you are capable, for, by Allah, Allah will not become weary until you become weary!” The work dearest to Allah’s Messenger (Allah bless him and give him peace) was that in which his Companion would persevere.'"