‏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....

‏القسامة والمحاربين والقصاص والديات‏ : Hadeeth No:4144 This hadith has been transmitted on the authority of Ya'la....