4 For if you will not let my people go, tomorrow I will send locusts into your land: 5 And the face of the earth will be covered with them, so that you will not be able to see the earth: and they will be the destruction of everything which up to now has not been damaged, everything which was not crushed by the ice-storm, and every tree still living in your fields. 6 And your houses will be full of them, and the houses of your servants and of all the Egyptians; it will be worse than anything your fathers have seen or their fathers, from the day when they were living on the earth till this day. And so he went out from Pharaoh.
Matthew Henry's Commentary on Exodus 10:4-6
Commentary on Exodus 10:1-11
(Read Exodus 10:1-11)
The plagues of Egypt show the sinfulness of sin. They warn the children of men not to strive with their Maker. Pharaoh had pretended to humble himself; but no account was made of it, for he was not sincere therein. The plague of locusts is threatened. This should be much worse than any of that kind which had ever been known. Pharaoh's attendants persuade him to come to terms with Moses. Hereupon Pharaoh will allow the men to go, falsely pretending that this was all they desired. He swears that they shall not remove their little ones. Satan does all he can to hinder those that serve God themselves, from bringing their children to serve him. He is a sworn enemy to early piety. Whatever would put us from engaging our children in God's service, we have reason to suspect Satan in it. Nor should the young forget that the Lord's counsel is, Remember thy Creator in the days of thy youth; but Satan's counsel is, to keep children in a state of slavery to sin and to the world. Mark that the great foe of man wishes to retain him by the ties of affection, as Pharaoh would have taken hostages from the Israelites for their return, by holding their wives and children in captivity. Satan is willing to share our duty and our service with the Saviour, because the Saviour will not accept those terms.