John 14:26

14:26 But the Advocate, the Holy Spirit, whom the Father will send in my name, will teach you everything, and will cause you to remember everything I said to you.

John 16:7

16:7 But I tell you the truth, it is to your advantage that I am going away. For if I do not go away, the Advocate will not come to you, but if I go, I will send him to you.