John 5:33
"You people have sent to John [the Immerser, for information. See 1:19] and he has given true testimony [about me].
John 1:6-8
There was a man sent from God whose name was John [the Immerser].
John 1:15-27
John gave testimony about Jesus, shouting out, "This person is the one about whom I said, 'He who will come after me ranks above me because He existed before me.'"
John 1:29-34
On the next day John [the Immerser] saw Jesus approaching him and said, "Look, [there is] the Lamb of God; He [will] take away the sin of the people of the world.
John 3:26-36
These disciples went to John and said to him, "Rabbi, look, that man who was with you on the east side of the Jordan River [i.e., Jesus], whom you testified about, is immersing people and everyone is going to him." [Note: Actually, it was Jesus' disciples who did the immersing. See 4:2].