‏الحج : Hadeeth No:3090 Fadl reported that a woman of Banu Khath'am said: Messenger of Allaah, my father is very old. There is an old obligation of Hajj upon him from Allaah, but he is not capable of sitting on the back of the camel. Thereupon Allaah's Prophet (sallAllaahu alayhi wa sallam) said: Perform Hajj on his behalf...

‏الإيمان : Hadeeth No:147 It is narrated on the authority of Abu Zubair that he heard Jabir b. 'Abdullah saying. I heard the Messenger of Allaah (may peace and blessings be upon him) observing this: Between man and polytheism and unbelief is the abandonment of salat....