Leviticus 15:14
And on the eighth day he shall take to him two turtledoves, or two young pigeons, and come before the Lord unto the door of the tabernacle of the congregation, and give them unto the priest:
Cross-reference
Leviticus 15:29 prescribes the same bird offering on day eight for a woman with a discharge — an identical ritual for the other gender.
Leviticus 15:30 specifies the birds are used for sin and burnt offerings — detailing the priest's action implied in verse 14.
Leviticus 12:8 prescribes the same two birds (turtledoves or pigeons) for a poor woman after childbirth — identical to this offering.
Leviticus 5:7 prescribes the same two-bird offering for a sin offering, showing the standard provision for the poor in purification rituals.
Leviticus 12:6 requires a bird (pigeon/turtledove) for sin offering after childbirth — a parallel purification offering.
Leviticus 14:22-31 prescribes a similar two-bird offering for cleansing a leper, showing a pattern of purification rituals after uncleanness.
Leviticus 1:14 lists turtledoves or pigeons as bird burnt offerings — the same birds used in this purification.
Leviticus 14:30 describes a similar offering of turtledoves for cleansing a leper, showing the same bird offering procedure for different uncleannesses.
Numbers 6:10 repeats the exact same offering for a defiled Nazirite — two turtledoves or pigeons on the eighth day, applying the same law.