وَمَا كُنتَ بِجَانِبِ الطُّورِ إِذْ نَادَيْنَا وَلَكِن رَّحْمَةً مِّن رَّبِّكَ لِتُنذِرَ قَوْمًا مَّا أَتَاهُم مِّن نَّذِيرٍ مِّن قَبْلِكَ لَعَلَّهُمْ يَتَذَكَّرُونَ
And you were not on the side of the Mount when We called out [to Moses], but [We have sent you as] a mercy from your Lord that you may warn a people to whom there did not come any warner before you, so that they may take admonition.
Agha Ali Puya Commentary
Commentary on Quran 28:46
[Pooya/Ali Commentary 28:46] Though the people did not believe in the messengers of Allah yet Allah sent the Holy Prophet as a warner and bearer of glad tidings to mankind in order to save them from eternal chastisement, and more so because if messengers were not sent then disbelievers could say that if one had been sent they would have followed Allah's signs and obeyed the prophets, and become believers.