Verses regarding baptism are found throughout the Bible, but the choice of verse depends on the method of baptism being performed. There are many aspects of baptism, which include proper administration, qualified recipients and the doctrine itself.
In the Bible, John baptized Jesus in the Jordan River (Matthew 3:13-17), and after his resurrection, Jesus issued the great commission to his 11 remaining disciples: "Go therefore and make disciples of all the nations, baptizing them in the name of the Father and the Son and the Holy Spirit, teaching them to observe all that I commanded you; and lo, I am with you always, even to the end of the age" (Matthew 28:19-20, NASB). Consequently, baptism is a sacrament of admission to the Christian church. The specific administration of baptism varies between Protestants and Catholics, but there are three modes of applying water during baptism: immersion, affusion and aspersion.
During immersion, the recipient enters a body of water, and the head is plunged either once or three times beneath the surface. Two verses supporting immersion are Romans 6:4 and Colossians 2:12. During affusion, water is poured on the head of the recipient, who stands either in water or on a dry surface. Two verses supporting affusion are Mark 1:10 and Acts 8:38. Finally, during aspersion, water is sprinkled on the head or face of the recipient. Two verses supporting aspersion are Ezekiel 36:25-26 and Numbers 8:5-7.