Mal 3:2 But who can endure the day of his coming, and who can stand when he appears? 4:1 “For behold, the day is coming, burning like an oven, when all the arrogant and all evildoers will be stubble. The day that is coming shall set them ablaze, says the Lord of hosts, so that it will leave them neither root nor branch. 2 But for you who fear my name, the sun of righteousness shall rise with healing in its wings. You shall go out leaping like calves from the stall. 3 And you shall tread down the wicked, for they will be ashes under the soles of your feet, on the day when I act, says the Lord of hosts. I take both of these to be either the incarnation or ministry of Jesus due to the surrounding verses about John the Baptist. How did evildoers become stubble, or set ablaze, or become ashes?