Sometimes they interpret the repetition of a noun to mean precisely the same noun, not some other thing that one might mistakenly think it is.

As when it is written מסולת המנחה (of the fine flour of the meal-offering)²⁷³ – not another meal-offering that gets mixed up with it.

footnotes: ²⁷³ Leviticus 6:8.

את הפר (the bullock)²⁷⁴ – not something exchanged for it.

footnotes: ²⁷⁴ Leviticus 4:4.

על ראש הפר (upon the head of the bullock)²⁷⁵ – to exclude goats brought for idol worship.

footnotes: ²⁷⁵ Leviticus 4:15.

מדמה (of the blood thereof)²⁷⁶ – and not of the sauce.

footnotes: ²⁷⁶ Leviticus 6:20.

And moreover, there are four interpretations for the four extra times the noun הזב (has the issue)²⁷⁷ is mentioned, in order to exclude four things.

When הזב is mentioned four times in Leviticus 15:4, 15:6, 15:8, and 15:9, they appear to be superfluous. But the reason for these repetitions is to teach that the Torah means precisely הזב and not four other things that one might mistakenly think fall within the scope of these four sentences²⁷⁸.

footnotes: ²⁷⁷ Leviticus 15:4. ²⁷⁸ Malbim, HaTorah v’HaMitzvah Metzora 130.