If you remain in me and my words remain in you, ask for whatever you wish, and it will be done for you.
In context
5I am the vine; you are the branches. Whoever remains in me, and I in him, bears much fruit; apart from me you can do nothing. 6If anyone does not remain in me, he is thrown aside like a branch and withers. Such branches are gathered up, thrown into the fire, and burned. 7If you remain in me and my words remain in you, ask for whatever you wish, and it will be done for you. 8This is how my Father is glorified: that you bear much fruit and become my disciples. 9As the Father has loved me, so I have loved you. Remain in my love.