Luke
Luke 3:5ESV·traditional attribution

Every valley shall be filled, and every mountain and hill shall be made low, and the crooked shall become straight, and the rough places shall become level ways,

Matthew Henry Presbyterian @wholebiblehenry

John's baptism introducing a new dispensation, it was requisite that we should have a particular account of it. Glorious things were said of John, what a distinguished favourite of Heaven he should be, and what a great blessing to this earth (Luk 1:15, Luk 1:17); but we lost him in the deserts, and there he remains until the day of his showing unto Israel, Luk 1:80.

Commenting on Luke 3:1-14

John Gill Reformed Baptist @doctorgill

Every valley shall be filled,.... Luke cites more out of the same prophecy, as relating to the times of John the Baptist, and the Messiah, than the other Evangelists Matthew and Mark do: in the prophet it is, "every valley shall be exalted"; which is done, by filling it up; the metaphor is persisted in, of preparing and clearing the way, for the coming of...

Albert Barnes Presbyterian @notesbybarnes

Verse 5. No entry from BARNES for this verse.