Leviticus 14:19

19 And the priest shall pray for him before the Lord, and shall make sacrifice for sin (and shall offer the sin offering);

Leviticus 14:19 Meaning and Commentary

Leviticus 14:19

And the priest shall offer the sin offering
This was the ewe lamb, according to the rite of every sin offering, as Aben Ezra says; and was typical of Christ, as all such offerings were, who was made sin and a sin offering for his people: and make an atonement for him that was to be cleansed from his
uncleanness;
for it seems the atonement was not perfected by the trespass offering and all the preceding rites; but a sin offering was necessary both on account of moral uncleanness, the cause of the leprosy, and of ceremonial uncleanness by it: and afterward he shall kill the burnt offering;
the other he lamb; the burnt offering for the most part following the sin or trespass offering as a gift by way of thankfulness, atonement being made for sin by the other offerings; which also was typical of Christ, as all burnt offerings were.

Leviticus 14:19 In-Context

17 Soothly he shall pour that that is left of the oil in the left hand, on the last part of the right ear of him which is (to be) cleansed, and on the thumbs of the right hand and foot, and on the blood which is shed for trespass, (And he shall put some of the oil that is still in his left hand, on the lobe of the right ear of him who is to be pronounced clean, and on the thumb of his right hand, and the great toe of his right foot, on top of the blood of the trespass offering,)

18 and (then pour the rest of the oil) on(to) his head.

19 And the priest shall pray for him before the Lord, and shall make sacrifice for sin (and shall offer the sin offering);

20 then the priest shall offer the burnt sacrifice, and he shall put it in the altar with his flowing sacrifices, and the man shall be cleansed rightfully. (then the priest shall offer the burnt sacrifice, and he shall put it on the altar with the grain offering, and by this rite the man shall be made clean.)

21 That if he is poor, and his hand may not find those things that be said, he shall take for his trespass a lamb to [the] offering, that the priest pray for him, and the tenth part of [tried] wheat flour sprinkled (al)together with oil, into sacrifice, and a sextary of oil, (But if he is poor, and his hand cannot find those things that be said above, he shall take a lamb for his trespass offering, as a special gift to the Lord, for the priest who shall pray for him, and the tenth part of an ephah of fine wheat flour sprinkled with oil, for the grain offering, and a pint of oil,)