تفسير : (on a straight path) you are holding firm to an established religion with which allah is pleased, i.e. islam.
Jalāl al-Dīn al-Maḥallī
تفسير : on a (‘alā is semantically connected to the preceding [statement]) straight path, that is, [you follow] the way of the prophets before you, [enjoining] the affirmation of god’s oneness and guidance (the emphasis expressed by the oath [in ‘by the definitive qur’ān’] and the remainder [of the statement] is a response to the disbelievers’ saying to him, ‘you have not been sent [by god]!’ [q. 13:43].
