John 15:2-5

2He 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. 3You are already clean because of the word I have spoken to you. 4Remain 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. 5“I am the vine; you are the branches. If you remain in me and I in you, you will bear much fruit; apart from me you can do nothing.