The first sacrifice consisted of two birds. One bird was killed, and its blood was mixed with clean water in pottery. Some of this mixture was sprinkled on the worshipper with the hyssop (Leviticus 14:7). The living bird was dipped in the water and set free. The two birds represent the healed Israelite: killing one bird probably signified the fate of the diseased person apart from God's intervention; setting free the other bird was symbolic of the removal of the disease.
4 le sacrificateur ordonnera que l'on prenne, pour celui qui doit être purifié, deux oiseaux vivants et purs, du bois de cèdre, du cramoisi et de l'hysope.