This speech is directed to the human whom Allah (swt) said about: (We have certainly created man in the best of stature; (4)), As if Allah (swt) is saying: O mankind, we created you and made you in the best stature, sent to you messages; at Mount Sinai and the secure city of Makkah, yet, what causes you to deny in spite of  that we showed you the signs.

بِالدِّينِ (the religion): Since it is defined with (the) so that it refers to the religion of Islam. Allah (swt) says:

 {إِنَّ الدِّينَ عِندَ اللَّهِ الْإِسْلَامُ}

(Indeed, the religion in the sight of Allah is Islam…) (Ali-Imram: 19)

Because all the divine messages came with the message of Islam. (the religion) also refers to the (Recompense).

So, what causes you, o mankind, to deny the Recompense?

Allah’s (swt) willed the Resurrection day, which is certainly right, because it gives balance to the existence, protects the poor and the oppressed, keeps the rightness in the universe, prevents life from turning into a jungle where the strong kills the weak, and the tyrant kills the oppressed. Allah (swt) is the Owner of this Day and will judge the creations for their deeds.