Exodus 3:18

3:18 “The elders will listen to you, and then you and the elders of Israel must go to the king of Egypt and tell him, ‘The Lord, the God of the Hebrews, has met with us. So now, let us go three days’ journey into the wilderness, so that we may sacrifice to the Lord our God.’

Exodus 5:3

5:3 And they said, “The God of the Hebrews has met with us. Let us go a three-day journey into the desert so that we may sacrifice to the Lord our God, so that he does not strike us with plague or the sword.”