'Baptism' in the Bible

John came baptizing in the wilderness, and proclaiming a baptism of reformation -- to remission of sins,

and Jesus said to them, 'Ye have not known what ye ask; are ye able to drink of the cup that I drink of, and with the baptism that I am baptized with -- to be baptized?'

And they said to him, 'We are able;' and Jesus said to them, 'Of the cup indeed that I drink of, ye shall drink, and with the baptism that I am baptized with, ye shall be baptized;

the baptism of John -- from heaven was it? or from men? answer me.'