Read and reflect on verse 386 from Surah Aal-i-Imraan: ALL FOOD was lawful unto the children of Israel, save what Israel had made unlawful unto itself [by its sinning] before the Torah was bestowed from on...
۞ كُلُّ الطَّعَامِ كَانَ حِلًّا لِبَنِي إِسْرَائِيلَ إِلَّا مَا حَرَّمَ إِسْرَائِيلُ عَلَىٰ نَفْسِهِ مِنْ قَبْلِ أَنْ تُنَزَّلَ التَّوْرَاةُ ۗ قُلْ فَأْتُوا بِالتَّوْرَاةِ فَاتْلُوهَا إِنْ كُنْتُمْ صَادِقِينَ
ALL FOOD was lawful unto the children of Israel, save what Israel had made unlawful unto itself [by its sinning] before the Torah was bestowed from on high. Say: "Come forward, then, with the Torah and recite it, if what you say is true!"