Exodus 3:18

CLV(i) 18 Then they will hearken to your voice, and you will enter, you and the elders of Israel, to the king of Egypt and say to him: Yahweh, the Elohim of the Hebrews, has met with us. So now, we pray, let us go a way of three days into the wilderness that we may sacrifice to Yahweh our Elohim.