'Baptism' in the Bible

But when he saw many of the Pharisees and Sadducees coming for baptism, he said to them, “You brood of vipers, who warned you to flee from the [divine] wrath and judgment to come?

But Jesus replied, “You do not realize what you are asking. Are you able to drink the cup [of suffering] that I am about to drink?” They answered, “We are able.”

The baptism of John—from where did it come? From heaven [that is, ordained by God] or from men?” And they began debating among themselves [considering the implications of their answer], saying, “If we say, ‘From heaven,’ He will say to us, ‘Then why did you not believe John?’