The kohein took some of the log of oil and poured it into another kohein’s hand, but if he poured it into his own hand, it’s still valid. He dipped his own right forefinger into the oil and sprinkled it seven times towards the Holy of Holies, dipping his finger into the oil for each sprinkling. The kohein then approached the metzora and he applied the oil to the same places where he had previously applied the blood, as per Leviticus 14:28, “On the same places as the blood of the guilt offering.” Then, “the kohein puts the rest of the oil in his palm on the head of the one being purified, to make atonement for him before Hashem” (Leviticus 14:29). Rabbi Akiva says that if the kohein puts the oil on the metzora’s head, then he has made atonement; if he doesn’t put the oil on the metzora’s head, he hasn’t made atonement. Rabbi Yochanan ben Nuri says that this is only the remnants of the mitzvah and the kohein has made atonement whether or not he put the oil on the metzora’s head but if he doesn’t place the oil, it’s considered as if he didn’t make atonement. If there was less than a log of oil before it was poured out, the kohein fills it up; if after it was poured out, he must bring other oil and do it again; this is the opinion of Rabbi Akiva. Rabbi Shimon says that if there was less than a log of oil before it was sprinkled, the kohein fills it up; if after it was sprinkled, he must bring other oil and do it again.
If the metzora was needy when he brought his offering but he subsequently became wealthy, or vice versa, everything follows the financial condition he was in when he brought his sin offering; this is the opinion of Rabbi Shimon. Rabbi Yehuda says that everything follows the financial condition he was in when he brought his guilt offering.