'Baptism' in the Bible

And he came into all the district around the Jordan, preaching a baptism of repentance for the forgiveness of sins;

When all the people and the tax collectors heard this, they acknowledged God’s justice, having been baptized with the baptism of John.

But I have a baptism to undergo, and how distressed I am until it is accomplished!

Was the baptism of John from heaven or from men?”