Have you thought that if he denies and turns away,
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Tafseer
'Abdullāh Ibn 'Abbās / Muḥammad al-Fīrūzabādī
تفسير : (hast thou seen if he denieth (allah's guidance)) and abu jahl disbelieved in allah's divine oneness (and is froward) and turned away from faith?
Jalāl al-Dīn al-Maḥallī
تفسير : have you considered what if he, the one forbidding the prophet, should be denying [god’s guidance] and turning away?, from faith.