Sahih Muslim
The Book of Prayers (Kitab Al-Salat)
Book Number: 004 / Hadith Number: 1596
'A'isha reported: When the Messenger of Allah (may peace be upon him) grew bulky and heavy he would observe (most of his Nafl) prayers sitting.
Book Number: 004 / Hadith Number: 1596
'A'isha reported: When the Messenger of Allah (may peace be upon him) grew bulky and heavy he would observe (most of his Nafl) prayers sitting.