Mark 1:3-5

3 The voice of one crying in the waste land, Make ready the way of the Lord, make his roads straight;

4 John came, and gave baptism in the waste land, preaching baptism as a sign of forgiveness of sin for those whose hearts were changed.

5 And there went out to him all the people of Judaea, and all those of Jerusalem, and they were given baptism by him in the river Jordan, saying that they were sinners.