John 1:23

He replied, "I am the voice of a man who is calling out in the desert, [urging people to] 'Make the road for the Lord straight,' as Isaiah the prophet said, [Isa. 40:3]."

Matthew 3:3

For this is the man who was spoken of by Isaiah the prophet, who said, [Isa. 40:3], "[It is] the voice of a man who speaks out in the desert, [urging people to] make the road for the Lord ready [for Him to travel]; to make a straight pathway for Him [to walk on]."

Mark 1:3

He will be the voice of a man shouting out in the desert, [urging people] to make the road for the Lord ready [to travel on]; to make a straight pathway for him."

Mark 1:3-5

He will be the voice of a man shouting out in the desert, [urging people] to make the road for the Lord ready [to travel on]; to make a straight pathway for him."

Luke 1:16-17

And he will influence many Israelites to turn to the Lord their God.

Luke 1:76-79

Yes, you [my] child [i.e., John], will be called the prophet of the Highest [i.e., God], for you will go ahead of the Lord's presence to prepare His ways.

Luke 3:4-6

This was according to what is written in the book containing the words of Isaiah, the prophet [Isa. 40:3ff], "The voice of a man who speaks out in the desert [urging people] to make the road for the Lord ready [for Him to travel]; to make a straight pathway for Him [to walk on].

John 3:28

You yourselves can testify that I said, 'I am not the Christ [i.e., God's specially chosen one] but [rather] that I was sent [by God] ahead of Him.'

Treasury of Scripture Knowledge

Summary

He said, I am the voice of one crying in the wilderness, Make straight the way of the Lord, as said the prophet Esaias.

General references

Bible References

I am

John 3:28
You yourselves can testify that I said, 'I am not the Christ [i.e., God's specially chosen one] but [rather] that I was sent [by God] ahead of Him.'
Matthew 3:3
For this is the man who was spoken of by Isaiah the prophet, who said, [Isa. 40:3], "[It is] the voice of a man who speaks out in the desert, [urging people to] make the road for the Lord ready [for Him to travel]; to make a straight pathway for Him [to walk on]."
Mark 1:3
from Isa. 40:3], "Look, I am sending my messenger on ahead of you. He will prepare the way for you.
Luke 1:16
And he will influence many Israelites to turn to the Lord their God.
Luke 3:4
This was according to what is written in the book containing the words of Isaiah, the prophet [Isa. 40:3ff], "The voice of a man who speaks out in the desert [urging people] to make the road for the Lord ready [for Him to travel]; to make a straight pathway for Him [to walk on].

General references

Matthew 11:10
He is the one about whom it was written [Mal. 3:1], 'Look, I [will] send my messenger on ahead of you. He will prepare the pathway in front of you.'