Exodus 10:8-9

10:8 So Moses and Aaron were brought back to Pharaoh, and he said to them, “Go, serve the Lord your God. Exactly who is going with you?” 10:9 Moses said, “We will go with our young and our old, with our sons and our daughters, and with our sheep and our cattle we will go, because we are to hold a pilgrim feast for the Lord.”

Exodus 10:26

10:26 Our livestock must also go with us! Not a hoof is to be left behind! For we must take these animals to serve the Lord our God. Until we arrive there, we do not know what we must use to serve the Lord.”