John preached about the Doctrines

Water Baptism

Matthew 3:11  

“I baptize you with water for repentance. But after me will come one who is more powerful than I, whose sandals I am not fit to carry. He will baptize you with the Holy Spirit and with fire.

John 1:31  

I myself did not know him, but the reason I came baptizing with water was that he might be revealed to Israel.”

Restitution

Matthew 3:8  

Produce fruit in keeping with repentance.

Luke 3:8  

Produce fruit in keeping with repentance. And do not begin to say to yourselves, ‘We have Abraham as our father.’ For I tell you that out of these stones God can raise up children for Abraham.

Godliness

Matthew 3:3-10

3 This is he who was spoken of through the prophet Isaiah: “A voice of one calling in the desert, ‘Prepare the way for the Lord, make straight paths for him.’”

4 John's clothes were made of camel's hair, and he had a leather belt around his waist. His food was locusts and wild honey.

5 People went out to him from Jerusalem and all Judea and the whole region of the Jordan.

6 Confessing their sins, they were baptized by him in the Jordan River.

7 But when he saw many of the Pharisees and Sadducees coming to where he was baptizing, he said to them: “You brood of vipers! Who warned you to flee from the coming wrath?

8 Produce fruit in keeping with repentance.

9 And do not think you can say to yourselves, ‘We have Abraham as our father.’ I tell you that out of these stones God can raise up children for Abraham.

10 The ax is already at the root of the trees, and every tree that does not produce good fruit will be cut down and thrown into the fire.

Matthew 14:4  

For John had been saying to him: “It is not lawful for you to have her.”

Matthew 3:7  

But when he saw many of the Pharisees and Sadducees coming to where he was baptizing, he said to them: “You brood of vipers! Who warned you to flee from the coming wrath?