Exodus 12:43

39 Since their dough had no leaven, the people baked what they had brought out of Egypt into unleavened loaves. For when they had been driven out of Egypt, they could not delay and had not prepared any provisions for themselves.

40 Now the duration of the Israelites’ stay in Egypt was 430 years.

41 At the end of the 430 years, to the very day, all the LORD’s divisions went out of the land of Egypt.

42 Because the LORD kept a vigil that night to bring them out of the land of Egypt, this same night is to be a vigil to the LORD, to be observed by all the Israelites for the generations to come.

43 And the LORD said to Moses and Aaron, “This is the statute of the Passover: No foreigner is to eat of it.

44 But any slave who has been purchased may eat of it, after you have circumcised him.

45 A temporary resident or hired hand shall not eat the Passover.

46 It must be eaten inside one house. You are not to take any of the meat outside the house, and you may not break any of the bones.

47 The whole congregation of Israel must celebrate it.

Read all of Exodus 12