23 He said: I am the voice of one crying in the wilderness: Make straight the way of the Lord, as said Isaiah the prophet.
John 1:23 Cross References - ABU
Matthew 3:3
3 For this is he that was spoken of through the prophet Isaiah, saying: The voice of one crying in the wilderness, Prepare the way of the Lord, Make straight his paths.
Mark 1:3
3 the voice of one crying in the wilderness, Prepare the way of the Lord, make straight his paths.
Luke 1:16-17
Luke 1:76-79
76 And also thou, O child, shalt be called Prophet of the Highest; for thou shalt go before the face of the Lord, to prepare his ways,
77 in order to give knowledge of salvation to his people in remission of their sins;
78 through the tender mercies of our God, whereby the dayspring from on high visited us,
79 to give light to those sitting in darkness and the shadow of death, in order to guide our feet into the way of peace.
Luke 3:4-6
4 as it is written in the book of the words of Isaiah the prophet: The voice of one crying in the wilderness, Prepare the way of the Lord, Make straight his paths.
5 Every valley shall be filled, And every mountain and hill shall be brought low; And the crooked shall be straight, And the rough ways smooth;
6 And all flesh shall see the salvation of God.
John 3:28
28 Ye yourselves bear me witness, that I said, I am not the Christ, but I am sent before him.