Luke
Luke 3:9ESV·traditional attribution

Even now the axe is laid to the root of the trees. Every tree therefore that does not bear good fruit is cut down and thrown into the fire.”

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

And now also the axe is laid unto the root of the trees,.... Not only to Jesse's family, which as a root in a dry ground, and to Jerusalem, the metropolis of the nation; but to the root of the vain boasting of every Jew; their descent from Abraham, the covenant made with him, their ecclesiastical state and civil polity, all which would quickly be...

Albert Barnes Presbyterian @notesbybarnes

Verse 9. No entry from BARNES for this verse. (g) "every tree"