Exodus 10:7-9

7Pharaoh's officers said to him, ‘Will you let this man bring trouble to us for ever? Allow the people to go. Then they can worship the Lord their God. Surely you understand by now that this man has destroyed Egypt!’

8So Pharaoh's officers took Moses and Aaron back to him. Pharaoh said to them, ‘Go and worship the Lord your God. But tell me, who will go?’

9Moses said, ‘We will all go, both young people and old people. We will take our sons and daughters. We will also take our animals, because we must have a feast to worship the Lord.’