Rom.1.21  for although they knew God they did not honor him as God or give thanks to him, but they became futile in their thinking and their senseless minds were darkened.
1Cor.3.20  and again, "The Lord knows that the thoughts of the wise are futile."
1Cor.15.17  If Christ has not been raised, your faith is futile and you are still in your sins.
Titus.3.9  But avoid stupid controversies, genealogies, dissensions, and quarrels over the law, for they are unprofitable and futile.
1Pet.1.18  You know that you were ransomed from the futile ways inherited from your fathers, not with perishable things such as silver or gold,

Hyper-concordance v1.1, by Sean Boisen. Scripture verses taken from the Revised Standard Version, copyright 1952, 1971.