All food was lawful to the Children of Israel, except what Israel Made unlawful for itself, before the Law (of Moses) was revealed. Say: "Bring ye the Law and study it, if ye be men of truth." (3:93)

Nor are the two bodies of flowing water alike,- the one palatable, sweet, and pleasant to drink, and the other, salt and bitter. Yet from each (kind of water) do ye eat flesh fresh and tender, and ye extract ornaments to wear; and thou seest the ships therein that plough the waves, that ye may seek (thus) of the Bounty of God that ye may be grateful. (35:12)

It is God Who made cattle for you, that ye may use some for riding and some for food; (40:79)

Then let man look at his food, (and how We provide it): (80:24)