Part of the law given through Moses to the Israelites in the wilderness and continued in force down through the centuries, related to the procedure prescribed for women after childbirth.[227] In compliance therewith, Mary remained in retirement forty days following the birth of her Son; then she and her husband brought the Boy for presentation before the Lord as prescribed for the male firstborn of every family. It is manifestly impossible that all such presentations could have taken place in the temple, for many Jews lived at great distances from Jerusalem; it was the rule, however, that parents should present their children in the temple when possible. Jesus was born within five or six miles from Jerusalem; He was accordingly taken to the temple for the ceremonial of redemption from the requirement applying to the firstborn of all Israelites except Levites. It will be remembered that the children of Israel had been delivered from the bondage of Egypt with the accompaniment of signs and wonders. Because of Pharaoh's repeated refusals to let the people go, plagues had been brought upon the Egyptians, one of which was the death of the firstborn throughout the land, excepting only the people of Israel. In remembrance of this manifestation of power, the Israelites were required to dedicate their firstborn sons to the service of the sanctuary.[228] Subsequently the Lord directed that all males belonging to the tribe of Levi should be devoted to this special labor instead of the firstborn in every tribe; nevertheless the eldest son was still claimed as particularly the Lord's own, and had to be formally exempted from the earlier requirement of service by the paying of a ransom.[229] In connection with the ceremony of purification, every mother was required to furnish a yearling lamb for a burnt offering, and a young pigeon or dove for a sin offering; but in the case of any woman who was unable to provide a lamb, a pair of doves or pigeons might be offered. We learn of the humble circumstances of Joseph and Mary from the fact that they brought the less costly offering, two doves or pigeons, instead of one bird and a lamb.