Exodus 12:43-51 - Institution Of The Passover
43 And Jehovah will say to Moses and Aaron, This the law of the passing over: every son of a stranger shall not eat of it. 44 And every servant of a man bought with silver, and thou hast circumcised him, then he shall eat of it 45 The sojourner and the hireling shall not eat of it 46 In one house shall it be eaten; thou shalt not bring forth out of the house from the flesh without, and ye shall not break a bone of it 47 All the assembly of Israel shall do it. 48 And when a stranger shall sojourn with thee, and do the passing over to Jehovah, all the males to him being circumcised, and then he shall draw near to do it; and he was as a native of the land: and every one uncircumcised shall not eat of it. 49 One law shall be to the native and to the stranger sojourning in the midst of you.
50 And all the sons of Israel will do as Jehovah commanded Moses and Aaron, so did they. 51 And it will be in this self-same day, Jehovah brought forth the sons of Israel out of the land of Egypt with their armies.