‏الصلاة : Hadeeth No:1591 'A'isha reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) used to recite in sitting position (while observing the Tahajjud prayer) and when he intended to bow, he would stand up and recite (for the duration in which) a man (ordinarily) recites forty verses....

‏الصيام : Hadeeth No:2403 A hadith like this has been narrated on the authority of 'Ubaidullah on the two chains of transmitters....