‏الزهد والرقائق‏ : Hadeeth No:7087 'A'isha reported: Never could the family of Muhammad (may peace. be upon him) (afford to eat) the bread of wheat for three (successive days) until he ran the course of his life....

‏الأضاحي : Hadeeth No:4836 Jabir reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: Sacrifice only a grown-up animal, unless it is difficult for you, in which case sacrifice a ram (of even less than a year, but more than six months' age)....