‏الصلاة : Hadeeth No:1596 'A'isha reported: When the Messenger of Allaah (sallAllaahu alayhi wa sallam) grew bulky and heavy he would observe (most of his Nafl) prayers sitting....

‏الحج : Hadeeth No:3196 This hadith is narrated on the authority of Abu Huraira by another chain of transmitters....