There remained not any green thing - See Clarke's note on Exodus 10:4.

For they covered the face of the whole earth,.... Of the whole land of Egypt; and this seems to be the instance in which these locusts differed from all others, that had been or would be, even in their numbers; for though there might have been before, and have been since, such vast numbers of them together as to darken the air and the sun, and by lighting first on one spot, and then on another, have destroyed whole countries; yet never was such an instance known as this, as that they should come in so large a body, and at once to light, and spread, and settle themselves over the whole country. Leo Africanus (p) indeed speaks of a swarm of locusts, which he himself saw at Tagtessa in Africa, A. D. 1510, which covered the whole surface of the ground; but then that was but in one place, but this was a whole country. It is in the original, "they covered the eye of the whole earth"; of which See Gill on Exodus 10:5.

so that the land was darkened; the proper colour of the earth, and the green grass on it, could not be seen for them, they lay so thick upon it; and being perhaps of a brown colour, as they often are, the land seemed dark with them:

and they did eat every herb of the land, and all the fruit of the trees, which the hail had left; for though every herb of the field is said to be smitten, and every tree of the field to be broke with it, Exodus 9:25, yet this, as has been observed, is to be understood either hyperbolically, or of the greater part thereof, but not of the whole:

and there remained not any green thing in the trees, or in the herbs of the field, through all the land of Egypt; the like is said to befall the province of Carpitania, in the nineth year of Childibert, king of France; which was so wasted by locusts, that not a tree, nor a vineyard, nor a forest, nor any sort of fruit, nor any other green thing remained (q). So Dr. Shaw (r) says of the locusts he saw as above related, that they let nothing escape them, eating up everything that was green and juicy, not only the lesser kinds of vegetables, but the vine likewise, the fig tree, the pomegranate, the palm, and the apple tree, even all the trees of the field. But then such devastations are usually made gradually, by these creatures moving from place to place, whereas this destruction in Egypt was done in one day. Indeed we are told in history, that in one country one hundred and forty acres of land were destroyed in one day (s); but what is this to all the land of Egypt? with this plague may be compared that of the locusts upon the sounding of the fifth trumpet, Revelation 9:1.

(p) Descriptio Africae, l. 2. p. 117. (q) Frantzii Hist. Animal. Sacr. par. 5. c. 4. p. 802. (r) Ut supra. (Travels, p. 187. Edit. 2.) (s) Frantz. ib. p. 800.

The darkening of the land, and the eating up of all the green plants by swarms of locusts, have been described by many eye-witnesses of such plagues. "Locustarum plerumque tanta conspicitur in Africa frequentia, ut volantes instar nebulae solis radios operiant" (Leo Afric). "Solemque obumbrant" (Pliny, h. n. ii. 29).

For they covered the face of the whole earth, so that the land was darkened; 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.

10:15 They covered the face of the earth, and eat up the fruit of it - The earth God has given to the children of men; yet when God pleaseth he can disturb his possession even by locusts or caterpillars. Herb grows for the service of man; yet, when God pleaseth, those contemptible insect's shall not only be fellow - commoners with him, but shall eat the bread out of his mouth.

10:12-20 God bids Moses stretch out his hand; locusts came at the call. An army might more easily have been resisted than this host of insects. Who then is able to stand before the great God? They covered the face of the earth, and ate up the fruit of it. Herbs grow for the service of man; yet when God pleases, insects shall plunder him, and eat the bread out of his mouth. Let our labour be, not for the habitation and meat thus exposed, but for those which endure to eternal life. Pharaoh employs Moses and Aaron to pray for him. There are those, who, in distress, seek the help of other people's prayers, but have no mind to pray for themselves. They show thereby that they have no true love to God, nor any delight in communion with him. Pharaoh desires only that this death might be taken away, not this sin. He wishes to get rid of the plague of locusts, not the plague of a hard heart, which was more dangerous. An east wind brought the locusts, a west wind carries them off. Whatever point the wind is in, it is fulfilling God's word, and turns by his counsel. The wind bloweth where it listeth, as to us; but not so as it respects God. It was also an argument for their repentance; for by this it appeared that God is ready to forgive, and swift to show mercy. If he does this upon the outward tokens of humiliation, what will he do if we are sincere! Oh that this goodness of God might lead us to repentance! Pharaoh returned to his resolution again, not to let the people go. Those who have often baffled their convictions, are justly given up to the lusts of their hearts.