Let them be as chaff before the wind,.... As they are; see Psa 1:4; and let the angel of the Lord chase them; either a good angel, who is the Lord's, his creature that ministers unto him, and is ready to obey his orders; and who, as he encamps about the saints and protects them, so he is able to destroy their enemies; as one angel in a night destroyed all the firstborn in Egypt, and another the whole army of the Assyrians, Exo 12:29; an angel of the Lord, who is swift to fly, and so to chase and overtake, and able to execute whatever is the will of the Lord; or else an evil angel, who is the Lord's, being made by him, though not made evil by him; and who is under his restraints, and can do nothing but by his permission; and who sometimes is employed by the Lord, as the executioner of his wrath upon wicked men; is suffered to distress and torture their consciences in this life, and hereafter drag them into everlasting burnings, prepared for the devil and his angels.