Sahih Muslim Book 001, Hadith Number 0008.

Chapter : On Prayer (Salat) which is one of the Pillars of Iman.

Another hadith, the like of which has been narrated by Malik (b. Anas) (and mentioned above) is also reported by Talha b. 'Ubaidullah, with the only variation that the Holy Prophet remarked: By his father, he shall succeed if he were true (to what he professed), or: By his father, he would enter heaven if he were true (to what he professed).