Afterward Moses and Aaron went to Pharaoh and said, 'This is what the Lord, the God of Israel, says: "Let my people go, so they may hold a festival to me in the wilderness."' Pharaoh said, 'Who is the Lord, that I should obey him and let Israel go? I do not know the Lord and I will not let Israel go.' Then they said, 'The God of the Hebrews has met with us. Now let us take a three-day journey into the wilderness to offer sacrifices to the Lord our God, or he may strike us with plagues or with the sword.' But the king of Egypt said, 'Moses and Aaron, why are you taking the people away from their labor? Get back to your work!' Then Pharaoh said, 'Look, the people of the land are now numerous, and you are stopping them from working.'
As we saw in chapter 4, Moses and Aaron had met with the leaders of Israel. As a result of that meeting, the people turned back to worshiping God. As we see here, they went back to observing the Sabbath day of rest. Before this, they had probably been working seven days a week and accomplishing much for the king of Egypt.