Luke 3:4

as it is written in the book of the prophet Isaiah, "The voice of one crying aloud! 'In the Desert prepare ye a road for the Lord: make His highway straight.

John 1:23

"I am the voice," he replied, "of one crying aloud, 'Make straight the Lord's way in the Desert,' fulfilling the words of the Prophet Isaiah."

Matthew 3:3

He it is who was spoken of through the Prophet Isaiah when he said, "The voice of one crying aloud, 'In the desert prepare ye a road for the Lord: make His highway straight.'"

Mark 1:3

"The voice of one crying aloud: 'In the Desert prepare a road for the Lord: Make His highways straight.'"

Luke 1:16-17

Many of the descendants of Israel will he turn to the Lord their God;

Luke 1:76-79

And you moreover, O child, shall be called Prophet of the Most High; For you shall go on in front before the Lord to prepare the way for Him,

John 1:7

He came as a witness, in order that he might give testimony concerning the Light--so that all might believe through him.

John 1:26-36

"I baptize in water only," John answered, "but in your midst stands One whom you do not know--

John 3:28-36

You yourselves can bear witness to my having said, 'I am not the Christ,' but 'I am His appointed forerunner.'

Treasury of Scripture Knowledge

Summary

As it is written in the book of the words of Esaias the prophet, saying, The voice of one crying in the wilderness, Prepare ye the way of the Lord, make his paths straight.

General references

Bible References

The voice

Matthew 3:3
He it is who was spoken of through the Prophet Isaiah when he said, "The voice of one crying aloud, 'In the desert prepare ye a road for the Lord: make His highway straight.'"
Mark 1:3
"The voice of one crying aloud: 'In the Desert prepare a road for the Lord: Make His highways straight.'"
John 1:23
"I am the voice," he replied, "of one crying aloud, 'Make straight the Lord's way in the Desert,' fulfilling the words of the Prophet Isaiah."

Prepare

Luke 1:16
Many of the descendants of Israel will he turn to the Lord their God;
John 1:7
He came as a witness, in order that he might give testimony concerning the Light--so that all might believe through him.
John 3:28
You yourselves can bear witness to my having said, 'I am not the Christ,' but 'I am His appointed forerunner.'

General references

Mark 1:3
"The voice of one crying aloud: 'In the Desert prepare a road for the Lord: Make His highways straight.'"