Exodus 10:23-25

American Standard Version

²³ they saw not one another, neither rose any one from his place for three days: but all the children of Israel had light in their dwellings. ²⁴ And Pharaoh called unto Moses, and said, Go ye, serve Jehovah; only let your flocks and your herds be stayed: let your little ones also go with you. ²⁵ And Moses said, Thou must also give into our hand sacrifices and burnt-offerings, that we may sacrifice unto Jehovah our God.