John 14:16-17 (NKJV)

16 And I will pray the Father, and He will give you another Helper, that He may abide with you forever— 17 the Spirit of truth, whom the world cannot receive, because it neither sees Him nor knows Him; but you know Him, for He dwells with you and will be in you.

John 14:26 (NKJV)

26 But the Helper, the Holy Spirit, whom the Father will send in My name, He will teach you all things, and bring to your remembrance all things that I said to you.

John 16:7 (NKJV)

7 Nevertheless I tell you the truth. It is to your advantage that I go away; for if I do not go away, the Helper will not come to you; but if I depart, I will send Him to you.

John 16:8 (NKJV)

8 And when He has come, He will convict the world of sin, and of righteousness, and of judgment:

John 16:13-15 (NKJV)

13 However, when He, the Spirit of truth, has come, He will guide you into all truth; for He will not speak on His own authority, but whatever He hears He will speak; and He will tell you things to come. 14 He will glorify Me, for He will take of what is Mine and declare it to you. 15 All things that the Father has are Mine. Therefore I said that He will take of Mine and declare it to you.

John 14:16 (AMP)

16 And I will ask the Father, and He will give you another Helper (Comforter, Advocate, Intercessor—Counselor, Strengthener, Standby), to be with you forever—