Romans 3:1
What advantage is there then in being a Jew, and what is the use of circumcision?
Romans 2:25-29
Circumcision will help you only if you observe the Law; but if you are a lawbreaker, you might as well be uncircumcised.
1 Corinthians 15:32
From the human point of view, what good is it to me that I have fought wild animals here in Ephesus? If the dead do not rise at all, "Let us eat and drink, for we will be dead tomorrow!"
Hebrews 13:9
You must not be carried away with strange varieties of teaching. The true way to steadfastness of heart is through God's mercy, not through scruples about food, which have never done their adherents any good.