Mark 1:3

the voice of one roaring in the wilderness; Prepare ye the way of the Lord; make His paths straight.

Matthew 3:3

This is the one, who is spoken of by Isaiah the prophet saying, The voice of one roaring in the wilderness; Prepare ye the way of the Lord; make straight His paths.

Luke 3:4-6

as has been written in the book of Isaiah the prophet, saying; The voice of one roaring in the wilderness; Prepare ye the way of the Lord, make straight His paths.

John 1:15

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 3:28-36

You are witnessing to me, that I said, I am not the Christ, but that I am sent before Him.

John 1:19-34

This is the testimony of John when the Jews sent priests and Levites from Jerusalem, that they might ask him,

Treasury of Scripture Knowledge

Summary

The voice of one crying in the wilderness, Prepare ye the way of the Lord, make his paths straight.

Bible References

General references

Matthew 3:3
This is the one, who is spoken of by Isaiah the prophet saying, The voice of one roaring in the wilderness; Prepare ye the way of the Lord; make straight His paths.
Luke 3:4
as has been written in the book of Isaiah the prophet, saying; The voice of one roaring in the wilderness; Prepare ye the way of the Lord, make straight His paths.
John 1:15
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 3:28
You are witnessing to me, that I said, I am not the Christ, but that I am sent before Him.