Mark 1:3

the voice of one crying in the wilderness, 'Prepare ye the way of the Lord, make His paths straight.'"

Matthew 3:3

for this is he that was spoken of by Isaiah, the prophet, saying, 'A voice of one crying in the wilderness, Prepare ye the way of the Lord, make His paths straight.'"

Luke 3:4-6

as it has been written in the book of the words of Isaiah the prophet, "The voice of one crying in the wilderness, 'Prepare ye the way of the Lord; make straight His paths.

John 1:15

John testifies concerning Him, and has cried, saying, "This was He of Whom I said, 'He That cometh after me hath become before me, because He was before me;'"

John 3:28-36

Ye yourselves bear me testimony, that I said, 'I am not the Christ, but that I have been sent before Him.'

John 1:19-34

And this is the testimony of John, when the Jews sent forth priests and Levites from Jerusalem, to ask him, "Who are you?"

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
for this is he that was spoken of by Isaiah, the prophet, saying, 'A voice of one crying in the wilderness, Prepare ye the way of the Lord, make His paths straight.'"
Luke 3:4
as it has been written in the book of the words of Isaiah the prophet, "The voice of one crying in the wilderness, 'Prepare ye the way of the Lord; make straight His paths.
John 1:15
John testifies concerning Him, and has cried, saying, "This was He of Whom I said, 'He That cometh after me hath become before me, because He was before me;'"
John 3:28
Ye yourselves bear me testimony, that I said, 'I am not the Christ, but that I have been sent before Him.'