Mark 13:15

And let him that is on the housetop not go down into the house, neither enter therein, to take any thing out of his house:

And let him that is on the house-top not go down into the house, neither enter therein, to take any thing out of his house: - that is, let him take the outside flight of steps from the roof to the ground; a graphic way of denoting the extreme urgency of the case, and the danger of being tempted, by the desire to save his property, to delay until escape should become impossible.