In the scripture below Christ says three times 'remain in me/vine'.
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. 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. John 15:4-5
This is what Barnes' Notes Commentary says regarding this text.
Abide in me - Remain united to me by a living faith. Live a life of dependence on me, and obey my doctrines, imitate my example, and constantly exercise faith in me. And I in you - That is, if you remain attached to me, I will remain with you, and will teach, guide, and comfort you. This he proceeds to illustrate by a reference to the vine. If the branch should be cut off an instant, it would die and be fruitless. As long as it is in the vine, "from the nature of the case," the parent stock imparts its juices, and furnishes a constant circulation of sap adapted to the growth and fruitfulness of the branch. So our piety, if we should be separate from Christ, or if we cease to feel our union to him and dependence on him, withers and droops.
I believe that part of remaining 'in' Him is to remain in His Word. I know for me being 'in' His Word daily I am refreshed and can feel the 'constant circulation' of His love, peace, guidance and comfort.