Matthew Poole and continuators on Exodus 10:15

15 For they covered the face of the whole earth, so that the land was darkned , and they did eat every herb of the land, and all the fruit of the trees, which the hail had left , and there remained not any green thing in the trees, or in the herbs of the field, through all the land of Egypt.

Either by their flying in vast numbers and so darkning the air, as they have oft times done: or by covering the green and lightsome herbs and productions of the earth with their dark and direful bodies.

How could this be, when the hail had smitten every herb, and broken every tree, chap. 9. 25. Ans. 1. There seems to have been some distance of time between these two plagues, in which space, new productions might be sprouting forth both out of the ground and from the trees. 2. The words all and every are commonly understood of the greatest part.