Frightening the Idolators of Quraysh

Allah threatens the idolators who denied and opposed His Messenger Muhammad ﷺ and He warns them of the punishment and painful torment He sent upon the previous nations who rejected their Messengers. Allah begins by mentioning Musa, upon him be peace, whom He sent along with his brother Harun as a helper -- i.e., as another Prophet who helped and supported him -- but Fir`awn and his chiefs denied them both:

دَمَّرَ اللَّهُ عَلَيْهِمْ وَلِلْكَـفِرِينَ أَمْثَـلُهَا

الَّذِينَ كَذَّبُوا بِآيَاتِنَا (who have rejected Our signs - 25:36). Here it is described that the people of Pharaoh had denied Allah's verses. It is to be noted that by that time Torah was not revealed to Sayyidna Musa (علیہ السلام) . Therefore it cannot be Torah which was denied. Hence it is either the proofs of the Oneness of Allah, which can be understood by any one according to his mental level, or the traditions of the past prophets which are passed on through generations, no matter in what little detail, are referred here as rejection of His message. The same thing is referred in Qur'an as well وَلَقَدْ جَاءَكُمْ يُوسُفُ مِن قَبْلُ بِالْبَيِّنَاتِ (Joseph brought you the clear signs before - 40:34). It mentions about the teachings of the earlier prophets, which had also reached them. (Bayan ul-Quran)