I am the true Vine,
and my Father is the husbandman.
Every branch in me that beareth not fruit
He taketh away:
and every branch that beareth fruit,
he purgeth it,
that it may bring forth more fruit
Now ye are clean through the word
which I have spoken unto you.

John 15:1-3
The Fruit
spoken of in this verse, is,
The Fruit of the Holy Spirit
The believer bears the Fruit of the Holy Spirit by doing what is called: 'Abiding' or 'living' in Christ; or, 'abiding', 'walking', or 'living in the Spirit; or 'abiding' in the Vine..

"But the Fruit of the Spirit is
love, joy,
peace, long-suffering, gentleness,
goodness, faith, meekness,
and temperance.  Against
such  there is no law. "
Ga 5:22