And sometimes it is repeated in order to teach that the noun is precise:

ואת החלב אשר עליהן (and the fat that is on them)³¹¹ – and not the meat.

footnotes: ³¹¹ Leviticus 3:4.

וראה את הנגע (And the priest shall look upon the plague)³¹² - that his eyes should be on the plague itself.

footnotes: ³¹² Leviticus 13:3.

על המטהר מן הצרעת (And he shall sprinkle upon him that is to be cleansed from the leprosy)³¹³ – and not him that is to be cleansed from the uncleanness of a dead body.

footnotes: ³¹³ Leviticus 14:7.

ולקח למטהר (to take for him that is to be cleansed)³¹⁴ – for all that is to be cleansed.

footnotes: ³¹⁴ Leviticus 14:4.

עצים על האש (and lay wood in order upon the fire)³¹⁵ – and not fire upon wood.

footnotes: ³¹⁵ Leviticus 1:7.

And moreover, a noun that is repeated several times or in another place will come precisely:

As it explains when it is written three times והנותרת מן המנחה (But that which is left of the meal-offering)³¹⁶.

footnotes: ³¹⁶ Leviticus 2:3.

And three times לפני אהל מועד (before the tent of meeting)³¹⁷.

footnotes: ³¹⁷ Leviticus 3:8.

And two times מנחה חדשה (new meal-offering)³¹⁸.

footnotes: ³¹⁸ Leviticus 23:16.