Where in the bible does it say that on good friday you should not eat meat?
I have not seen anywhere that on Good Friday you should not eat meat. However, most Jewish dietary laws in the bible may be found in the book of Leviticus in the Old Testament. However, with Christians, who follow the doctrine of Jesus Christ, one lives under the grace of the New Covenant or “New Testament” and the two commandments of Christ and is no longer subject to all of the old dietary laws. In the Book of Matthew, Chapter 15, verse 11: Jesus Christ said to the multitudes; “Not that which goeth into the mouth defileth a man; but that which cometh out of the mouth, this defileth a man.