Bismillah Walhamdulillah Was Salaatu Was Salaam ‘ala Rasulillah
Narrated Aisha (Radi-Allahu ‘anha):
The
Prophet (Sallallahu ‘Alaihi Wa Sallam) used to offer prayer at night
(for such a long time) that his feet used to crack. I said, “O Allah’s
Apostle! Why do you do it since Allah has forgiven you your faults of
the past and those to follow?” He said, “Shouldn’t I love to be a
thankful slave (of Allah)?’ When he became old, he prayed while sitting,
but if he wanted to perform a bowing, he wound get up, recite (some
other verses) and then perform the bowing.
Bukhari Vol. 6 : No. 361