John Lightfoot on Matthew 3:10

[The axe is laid to the root.] These words seem to be taken from Isaiah 5:33,34. The destruction of the nation was to proceed from the Romans, who had now a great while held them under the yoke. That axe, now laid to the root of the tree, shall certainly cut it down, if from this last dressing by the gospel it bears not fruit. In the Talmud, those words of Isaiah are applied to the destruction of the city; and thence it is argued, that the Messias should be born not much after the time of that destruction, because presently after the threatening of that ruin follows, "A Branch shall arise out of the stock of Jesse," Isaiah 11:1.