Jesus replied, "The work of God is this: to believe in the One He has sent."

John 3:17
For God did not send His Son into the world to condemn the world, but to save the world through Him.

John 6:28
Then they inquired, "What must we do to perform the works of God?"

John 6:38
For I have come down from heaven, not to do My own will, but to do the will of Him who sent Me.

John 6:57
Just as the living Father sent Me and I live because of the Father, so also the one who feeds on Me will live because of Me.

Romans 4:5
However, to the one who does not work, but believes in Him who justifies the wicked, his faith is credited as righteousness.

1 Thessalonians 1:3
and continually recalling before our God and Father your work of faith, your labor of love, and your enduring hope in our Lord Jesus Christ.

James 2:22
You see that his faith was working with his actions, and his faith was perfected by what he did.

1 John 3:23
And this is His commandment: that we should believe in the name of His Son, Jesus Christ, and we should love one another just as He commanded us.

Revelation 2:26
And to the one who overcomes and continues in My work until the end, I will give authority over the nations.

Jesus answered and said to them, This is the work of God, that you believe on him whom he has sent.