Presentation of Christ in the Temple

Giotto di Bondone (Florentine painter, c 1267-1337). The Presentation of the Infant Jesus in the
Temple c 1320

The Presentation of Jesus at the Temple or Candlemas is described in the Gospel of Luke (Luke 2:22–40). According to the gospel, Mary and Joseph took the baby Jesus to the Temple in Jerusalem 40 days  after his birth to complete Mary's ritual purification after childbirth, and to perform the redemption of the firstborn, in obedience to the Law of Moses (Leviticus 12, Exodus 13:12-15, etc.). Luke explicitly says that Joseph and Mary take the option provided for poor people (those who could not afford a lamb) (Leviticus 12:8), sacrificing "a pair of turtledoves, or two young pigeons." (Leviticus 12:1-4 indicates that this event should take place forty days after birth for a male child, hence the Presentation is celebrated 40 days after Christmas.)