Leviticus 14:3
And the priest shall go forth out of the camp; and the priest shall look, and, behold, if the plague of leprosy be healed in the leper;
Cross-reference
Leviticus 14:48 describes the same priestly examination for a house with mildew — parallel to the human leprosy cleansing procedure here.
In Leviticus 13:46, lepers dwell alone outside the camp — this explains why the priest must go out to examine them here.
Leviticus 13:2 prescribes the initial diagnosis of leprosy by the priest — this verse gives the procedure for when the disease is healed.
Luke 17:15 shows a healed leper returning to Jesus — the priest's examination (as commanded here) was the next step, but the Samaritan's gratitude highlights faith.
Luke 17:16-19 recounts the Samaritan's thanksgiving and Jesus' response — the priestly examination (Leviticus) was still required, but Jesus emphasizes faith over ritual.
Matthew 11:5 lists cleansing lepers as a messianic sign — this OT law for their cleansing anticipates that healing ministry.
Luke 7:22 lists cleansing lepers as evidence of the Messiah — this law prescribed the process for their restoration, now fulfilled in Christ.
In 2 Kings 5:14, Naaman is healed by washing — the prerequisite event before the priestly examination described here.
In Matthew 10:8, Jesus commands disciples to cleanse lepers — a New Testament extension of the healing that the priest here only verifies.
Luke 4:27 recalls Naaman's cleansing as a Gentile — contrasting with many lepers in Israel, showing God's mercy beyond the priestly system.