Acts 13:24

and John having preached the baptism of repentance to all the people of Israel, before the face of his coming.

Acts 1:22

beginning from the baptism of John, until the day on which He was taken up from us, it behooveth one of these to be witness of His resurrection along with us.

Matthew 3:1-11

In those days comes John the Baptist, preaching in the wilderness of Judea,

Mark 1:2-8

As has been written in the prophets; Behold, I send my messenger before thy face, who will prepare thy way before thee;

Luke 1:76

And thou, little child, shall be called a prophet of the Highest; for thou shalt go before the face of the Lord to prepare His ways,

Luke 3:2-20

and Caiaphas, the word of God came to John the son of Zacharias in the wilderness.

John 1:6-8

There was a man having been sent from God, whose name was John;

John 1:15-18

John beareth witness concerning Him, and cried out saying; This is He of whom I spoke, He that cometh after me has been before me:

John 3:25-36

And there was a disputation of the disciples of John, concerning purifying.

John 5:33-36

You sent to John, and he witnessed to the truth:

Acts 10:37

This word you know, which was throughout all Judea, beginning from Galilee, after the baptism which John preached;

Acts 19:3-4

And he said, Into what then were you baptized? And they said, Into the baptism of John.

Treasury of Scripture Knowledge

Summary

When John had first preached before his coming the baptism of repentance to all the people of Israel.

Bible References

General references

Acts 1:22
beginning from the baptism of John, until the day on which He was taken up from us, it behooveth one of these to be witness of His resurrection along with us.
Acts 10:37
This word you know, which was throughout all Judea, beginning from Galilee, after the baptism which John preached;
Acts 19:3
And he said, Into what then were you baptized? And they said, Into the baptism of John.
Matthew 3:1
In those days comes John the Baptist, preaching in the wilderness of Judea,
Mark 1:2
As has been written in the prophets; Behold, I send my messenger before thy face, who will prepare thy way before thee;
Luke 1:76
And thou, little child, shall be called a prophet of the Highest; for thou shalt go before the face of the Lord to prepare His ways,
Luke 3:2
and Caiaphas, the word of God came to John the son of Zacharias in the wilderness.
John 1:6
There was a man having been sent from God, whose name was John;
John 3:25
And there was a disputation of the disciples of John, concerning purifying.
John 5:33
You sent to John, and he witnessed to the truth: