Jesus answered, Truly, truly, I say to you, If one is not generated out of water and Spirit, he is not able to enter into the kingdom of God.
John 3:5
And Philip said, If you believe from all the heart, it is lawful. And answering he said, I believe Jesus Christ to be the Son of God. And he commanded the chariot to stand still. And both went down into the water, both Philip and the eunuch; and he baptized him. But when they came up out of the water, the Spirit of the Lord caught away Philip. And the eunuch did not see him any more; for he went his way rejoicing.
Acts 8:37-39
Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.
Acts 2:38
And now what do you intend? Arise, be baptized and wash away your sins, calling on the name of the Lord.
Acts 22:16
And he commanded them to be baptized in the name of the Lord. Then they asked him to remain some days.
Acts 10:48
For as many of you as have been baptized into Christ have put on Christ.
Galatians 3:27
And they said, Believe on the Lord Jesus Christ, and you will be saved, you and your household. And they spoke the Word of the Lord to him, and to all those in his house. And taking them in that hour of the night, he washed from their stripes. And he and all those belonging to him were baptized at once.
Acts 16:31-33
Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost;
Titus 3:5
Baptized
baptizoĢ
bap-tid’-zo
From a derivative of G911; to make whelmed (that is, fully wet); used only (in the New Testament) of ceremonial ablution, especially (technically) of the ordinance of Christian baptism: – baptist, baptize, wash.
Once baptized, you know are born again, and can know Him.