John 15:2, 4, 8

He cuts off every branch in me that bears no fruit, while every branch that does bear fruit he prunes so that it will be even more fruitful.

Remain in me, as I also remain in you. No branch can bear fruit by itself; it must remain in the vine. Neither can you bear fruit unless you remain in me.

This is to my Father’s glory, that you bear much fruit, showing yourselves to be my disciples.