Isaiah 40:6 follows immediately with another 'voice' — part of the same prophetic oracle, extending the call to cry out.

Isaiah 43:19 promises a way in the wilderness, directly paralleling the highway prepared for the Lord in 40:3.

In Isaiah 49:11, God promises to make mountains into roads — directly echoing the highway theme from the call to prepare the way.

Isaiah 19:23 promises a highway connecting Egypt and Assyria — same highway imagery as the way prepared for the Lord in the wilderness.

Isaiah 35:8 develops the highway imagery: here it's a way for God's return, there it's a holy way for the redeemed.

Isaiah 57:14 echoes this call to prepare the way, now specifically removing obstacles for God's people.

Isaiah 62:10 repeats the 'prepare the way' command and builds up the highway imagery.

Isaiah 11:16 continues the highway theme for the remnant, echoing the same deliverance imagery as the way in the wilderness.

Isaiah 62:11 announces the arrival of salvation, the goal of preparing the way here.

John 1:23 has John the Baptist directly identify himself as the voice crying in the wilderness from this verse.

Luke 3:2-6 quotes this passage to identify John the Baptist as the voice preparing the way.

Luke 1:76 directly quotes Isaiah 40:3: 'you will go on before the Lord to prepare the way for him.'

Luke 1:17 links John to Elijah and says he will 'make ready a people prepared for the Lord', fulfilling Isaiah 40:3.

Luke 1:16 describes John the Baptist turning many to God, fulfilling the preparation ministry announced in Isaiah 40:3.

Mark 1:2-5 cites this verse as the prophecy fulfilled by John the Baptist's ministry.

Matthew 3:1-3 explicitly quotes this verse as fulfilled in John the Baptist preparing the way for Jesus.

Malachi 4:5 predicts Elijah before the great day, whom the NT identifies as John the Baptist, the voice in the wilderness.

In Malachi 3:1, the same promise of a messenger preparing the way appears, directly connecting to the voice in the wilderness.

Mark 1:3 directly quotes this verse, applying it to John the Baptist as the wilderness voice preparing for Jesus.

Matthew 3:3 directly quotes this verse, identifying John the Baptist as the voice preparing the way for the Lord.

Luke 3:4 directly quotes this verse, introducing John the Baptist as the fulfillment of the wilderness preparation for the Lord.

Zechariah 4:7 uses the same 'mountain become plain' image for Zerubbabel's temple work, echoing Isaiah's leveling theme in a different context.

Matthew 11:10 quotes Malachi about a messenger preparing the way—a parallel prophecy of a forerunner, not a direct citation of this verse.

Luke 1:77 continues from 1:76, describing the salvation and forgiveness that the preparation ministry brings.

Luke 7:27 quotes Malachi about a messenger preparing the way—parallel theme of a forerunner, but not a direct citation of this Isaiah verse.