'Baptism' in the Bible

John came, who baptized in the wilderness and preached the baptism of repentance unto remission of sins.

But Jesus said unto them, Ye know not what ye ask. Are ye able to drink the cup that I drink? or to be baptized with the baptism that I am baptized with?

And they said unto him, We are able. And Jesus said unto them, The cup that I drink ye shall drink; and with the baptism that I am baptized withal shall ye be baptized:

The baptism of John, was it from heaven, or from men? answer me.