Romans 3:1
What special privilege, then, has a Jew? Or, what benefit does circumcision confer?
Romans 2:25-29
Now circumcision benefits you only if you practice the law, but if you break the law, your circumcision is no better than uncircumcision.
1 Corinthians 15:32
If from merely human motives I have fought wild beasts here in Ephesus, what profit will it be to me? If the dead are never raised at all, "Let us eat and drink, for tomorrow we shall be dead."
Hebrews 13:9
You must stop being carried away with varied and strange teachings. For it is a good thing for the heart to be strengthened by God's spiritual strength, not by special kinds of food, from which those adhering to them have gotten no good.