John the Baptist who Jesus called the most holy of humans,had a ministry of baptizing primarily adults including Jesus Himself who was not baptized until He was approximately 30 years of age.
13 Then Jesus came from Galilee to John at the Jordan to be baptized by him. 14 And John tried to prevent Him, saying, “I need to be baptized by You, and are You coming to me?”
15 But Jesus answered and said to him, “Permit it to be so now, for thus it is fitting for us to fulfill all righteousness.” Then he allowed Him.
ANY discussion of baptism must include a mention of the much more important and separate baptism,the Baptism of the Holy Spirit, which only comes from God in response to fervent prayer.
3 Jesus answered and said to him, “Most assuredly, I say to you, unless one is born again, he cannot see the kingdom of God.”
4 Nicodemus said to Him, “How can a man be born when he is old? Can he enter a second time into his mother’s womb and be born?”
5 Jesus answered, “Most assuredly, I say to you, unless one is born of water and the Holy Spirit, he cannot enter the kingdom of God. 6 That which is born of the flesh is flesh, and that which is born of the Spirit is spirit. 7 Do not marvel that I said to you, ‘You must be born again.’