Just as Jesus said - so is every one that is born of the Spirit

 Jesus spoke to Nicodemus, a ruler of the Jews.

"There was a man of the Pharisees, named Nicodemus, a ruler of the Jews: the same came to Jesus by night..." - John 3:1-2 KJV

Jesus spoke to Nicodemus about a spiritual rebirth.

"Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God." - John 3:3 KJV

Nicodemus had trouble understanding that Jesus was speaking of a spiritual birth, not a natural birth.

"Nicodemus saith unto him, How can a man be born when he is old? can he enter the second time into his mother's womb, and be born?" - John 3:4 KJV

"Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God." - John 3:5 KJV

Jesus further explained.

"The wind bloweth where it listeth, and thou hearest the sound thereof, but canst not tell whence it cometh, and whither it goeth: so is every one that is born of the Spirit." - John 3:8 KJV

Jesus revealed that, like the wind, there is a sound that comes with the birth of the Spirit.

When Jesus poured out His Spirit on the day of Pentecost, there came a sound from heaven. This sound was compared to the wind.

"And when the day of Pentecost was fully come, they were all with one accord in one place. And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting." - Acts 2:1-2 KJV

That sound from heaven as of a rushing might wind was the hundred and twenty believers in the upper room speaking in tongues as they were born of the Spirit.

"And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance." - Acts 2:4 KJV

Just as Jesus said – “so is every one that is born of the Spirit.”