From Sahih Muslim (Hadith 101):
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 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)
Reference: Muslim 101