The present article, aiming to defend the infallibility of Prophet Yusuf (AS), has adopted a comparative approach between the exegeses of the two Islamic schools to provide a correct interpretation of these two expressions. Through rational arguments and the use of Qur'anic data, it has been explained that Yusuf's "ham" (immense impulse) signifies an involuntary emotion which, upon seeing the "burhan" (divine proof), became impossible to actualize. The "burhan" itself is an infallibility granted to him due to his prophethood, through which he attained a knowledge that absolutely precluded any inclination towards sin. The findings of the article indicate that there is no contradiction between the Qur'an and the Testamentary Scriptures, and both sources emphasize the chastity of Yusuf (AS). However, some Talmudic narratives contain incorrect and unbefitting content regarding the prophets, which are the source of Isra'iliyat (Judeo-Christian narratives) in Islamic exegeses. This research critiques and repudiates these Isra'ili narrations and reinforces the infallibility-oriented interpretation of the verse for the prophets.