1 Corinthians 15:2, 17
By this gospel you are saved, if you hold firmly to the word I preached to you. Otherwise, you have believed in vain. . . .

Psalm 73:13
Surely in vain I have kept my heart pure; in innocence I have washed my hands.

Isaiah 49:4
But I said, "I have labored in vain, I have spent my strength in futility and vanity; yet my vindication is with the LORD, and my reward is with my God."

Genesis 8:8
Then Noah sent out a dove to see if the waters had receded from the surface of the ground.

Matthew 15:9
They worship Me in vain; they teach as doctrine the precepts of men.'"

Acts 17:31
For He has set a day when He will judge the world with justice by the Man He has appointed. He has given proof of this to all men by raising Him from the dead."

Galatians 2:2
I went in response to a revelation and set before them the gospel that I preach among the Gentiles. But I spoke privately to those recognized as leaders, for fear that I was running or had already run in vain.

James 1:26
If anyone considers himself religious and yet does not bridle his tongue, he deceives his heart and his religion is worthless.

James 2:20
O foolish man, do you want evidence that faith without deeds is worthless?