Eat not of (meats) on which Allah's name hath not been pronounced: That would be impiety. But the evil ones ever inspire their friends to contend with you if ye were to obey them, ye would indeed be Pagans. Al-An'am 6:121 ⧉
Tafsir:
In the matter of eating and drinking and other everyday routines, every community develops a customary religion. People have strong feelings about this customary or traditional religion because of the testimonies of ancestors and of great men of the past, which exist in its support. Deviation from this becomes synonymous with turning away from the religion of the revered forefathers. So, when the call of Truth clashes with this customary religion, all sorts of objections are raised against it. The great men of the day seek out such aspects of established practices as will convince the general public that their customary religion is correct and the ‘new religion’ is wrong. But God is aware of everything. On Doomsday, when He lays bare the realities, every individual will see whether he has been standing on the firm ground of reality or on the thin ice of superstition.