‏الصلاة : Hadeeth No:1595 'A'isha reported that the Messenger of Allaah (sallAllaahu alayhi wa sallam) died (in this very state) that he observed most of his (Nafl) prayers in a sitting position....

‏الزكاة : Hadeeth No:2252 This hadith has been narrated with the same chain of transmitters except with this change (of words):" Which charity is most excellent?"...