All this happened, more or less.

And Moses said unto God: 'Who am I, that I should go unto Pharaoh, and that I should bring forth the children of Israel out of Egypt?'

And He said: 'Certainly I will be with thee; and this shall be the token unto thee, that I have sent thee: when thou hast brought forth the people out of Egypt, ye shall serve God upon this mountain.' Exodus, 3:11-12

Go, and gather the elders of Israel together, and say unto them: The LORD, the God of your fathers, the God of Abraham, of Isaac, and of Jacob, hath appeared unto me, saying: I have surely remembered you, and seen that which is done to you in Egypt.

And I have said: I will bring you up out of the affliction of Egypt unto the land of the Canaanite, and the Hittite, and the Amorite, and the Perizzite, and the Hivite, and the Jebusite, unto a land flowing with milk and honey.

And they shall hearken to thy voice. And thou shalt come, thou and the elders of Israel, unto the king of Egypt, and ye shall say unto him: The LORD, the God of the Hebrews, hath met with us. And now let us go. we pray thee, three days' journey into the wilderness, that we may sacrifice to the LORD our God. Exodus, 3:16-18