Jesus said this about being born again.
John 3
5 Jesus answered, “Most assuredly, I say to you, unless one is born (again) of water and the Spirit, he cannot enter the kingdom of God.
So two actions are involved to making a whole born again person, born again of water and the Spirit.
So what is this water?, it is the washing of regeneration.
And what is the Spirit?, the renewing in the Holy Spirit
A total agreement with Titus 3
4 But when the kindness and the love of God our Savior toward man appeared,
5 not by works of righteousness which we have done, but according to His mercy He saved us, through the washing of regeneration and renewing of the Holy Spirit,
6 whom He poured out on us abundantly through Jesus Christ our Savior,
7 that having been justified by His grace we should become heirs according to the hope of eternal life.
This is what He does, not what we do.
Jesus talks of washing in various places.
To those evil Pharisees and scribes, He tells them they must be cleansed on the inside, and notice this is not something they can do for themselves. He is telling them that is what God does.
Matthew 23
25 “Woe to you, scribes and Pharisees, hypocrites! For you cleanse the outside of the cup and dish, but inside they are full of extortion and self-indulgence.26 Blind Pharisee, first cleanse the inside of the cup and dish, that the outside of them may be clean also.
Then in John 13, Jesus tells them He washes them clean. They do not wash themselves clean.
John 13
8 Peter said to Him, “You shall never wash my feet!”
Jesus answered him, “If I do not wash you, you have no part with Me.”
9 Simon Peter said to Him, “Lord, not my feet only, but also my hands and my head!”
10 Jesus said to him, “He who is bathed needs only to wash his feet, but is completely clean; and you are clean, but not all of you.”
11 For He knew who would betray Him; therefore He said, “You are not all clean.”
Unless Christ washes us we have no part in Him. So we are born again of His washing us clean on the inside, the regeneration.
And we are renewed of the Holy Spirit to complete our being born again.
This is not water baptism, this is a work of the Holy Spirit apart from us, He makes us born again, that is born of God so that we receive the adoption as sons of God since He is our Father, we are therefore adopted into His family.
As we also read John 6, Jesus teaches that those who are drawn, and then they all come to Christ those who have heard and learned from the Father. Just as Christ washed His disciples and they were cleansed on the inside, so too are those who are drawn-dragged to Christ by God cleansed on the inside, they are born again by the Holy Spirit, and that is not of their doing, nor of their will, nor of their flesh, it is the gift of God lest any would boast.
John 1
10 He was in the world, and the world was made through Him, and the world did not know Him.
11 He came to His own, and His own did not receive Him.
12 But as many as received Him, to them He gave the right to become children of God, to those who believe in His name:
13 who were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God.
Those that received Him, he had already born them again of God. The flesh was excluded as being a part of the decision, it was entirely the gift of God that they were born again.