Romans 3:1
WHAT then is the superiority of the Jew? or what is the advantage of circumcision?
Romans 2:25-29
For circumcision indeed is advantageous, if thou practise the law: but if thou art a transgressor of the law, thy circumcision becomes uncircumcision,
1 Corinthians 15:32
If after the manner of men I have fought with wild beasts at Ephesus, of what advantage would it be to me, if the dead did not rise again? shall we eat and drink; because to-morrow we die?
Hebrews 13:9
Be not tossed about by various and strange doctrines: for it is good to have the heart firmly established by grace, not by meats, in which observances they who have walked have found no manner of advantage.