Exodus 10:24-26 Darby Translation (DARBY)

²⁴ And Pharaoh called Moses and said, Go, serve Jehovah; only, let your flocks and your herds remain; let your little ones also go with you.

²⁵ And Moses said, Thou must give also sacrifices and burnt-offerings into our hands, that we may sacrifice to Jehovah our God.

²⁶ Our cattle also must go with us: there shall not a hoof be left behind; for we must take thereof to serve Jehovah our God; and we do not know with what we must serve Jehovah, until we come there.