Two sentences that are linked by cause and effect through the word כי, where one sentence is the reason for its associate – they must be talking about the same matter, and it will only warn in the sentence that is effect when it warns in the sentence that is the cause.

Leviticus 7:23-25 says, דבר אל בני ישראל לאמר כל חלב שור וכשב ועז לא תאכלו. וחלב נבלה וחלב טרפה יעשה לכל מלאכה ואכל לא תאכלהו. כי כל אכל חלב מן הבהמה אשר יקריב ממנה אשה ליהוה ונכרתה הנפש האכלת מעמיה*(Speak unto the children of Israel, saying: You shall eat no fat, of ox, or sheep, or goat. And the fat of that which dies of itself, and the fat of that which is torn of beasts, may be used for any other service; but you shall in no wise eat of it. For whosoever eats the fat of the beast, of which men present an offering made by fire to the LORD, even the soul that eats it shall be cut off from his people), linking the sentences by cause and effect via the word כי. Thus, by Rule 226 Leviticus 7:23-24 and Leviticus 7:25 must be talking about the same matter, the prohibition of eating fat⁵²⁶.*

footnotes: ⁵²⁶ Malbim, HaTorah v’HaMitzvah Tzav 141.