‏الصلاة : Hadeeth No:1501 Ibn 'Umar reported: I saw the Messenger of Allaah (sallAllaahu alayhi wa sallam) praying (Nafl prayer) on a donkey's back while his face was turned towards Khaibar....

‏الصيام : Hadeeth No:2525 A hadith like this has been narrated on the authority of 'Ubaidullah b. Abi Yazid....