Matthew 3:3 also identifies John as the forerunner, quoting Isaiah 40:3 — same figure, different prophecy.

Isaiah 40:3 is the other major OT preparation prophecy applied to John — parallel to the Malachi quote here.

Malachi 3:1 is the exact verse quoted here — sending a messenger to prepare the way before the Lord.

Mark 1:2 quotes the same Malachi 3:1 verse about the messenger — identical citation.

Luke 7:27 contains the identical quotation of Malachi 3:1 about the messenger — parallel account.

John 1:23 records John the Baptist applying Isaiah 40:3 to himself — same preparatory role as the Malachi quote.

Luke 1:76 prophesies John will 'go before the Lord to prepare his ways' — echoing the same forerunner role as here.

John 1:6 identifies the messenger from Malachi as John the Baptist, showing the prophecy being fulfilled.

Malachi 4:5 prophesies Elijah's coming before the Lord — a related forerunner prophecy also fulfilled in John.