'Baptism' in the Bible

But when he saw many of the Pharisees and Sadducees coming for his baptism, he said to them, "You offspring of vipers, who warned you to flee from the wrath to come?

But Jesus answered, "You don't know what you are asking. Are you able to drink the cup that I am about to drink, and be baptized with the baptism that I am baptized with?" They said to him, "We are able."

He said to them, "You will indeed drink my cup, and be baptized with the baptism that I am baptized with, but to sit on my right hand and on my left hand is not mine to give; but it is for whom it has been prepared by my Father."

The baptism of John, where was it from? From heaven or from men?" They reasoned with themselves, saying, "If we say, 'From heaven,' he will ask us, 'Why then did you not believe him?'