Leviticus 16:1

'וידבר ה' אל משה אחרי מות שני בני אהרן וגו‎‎ AND THE LORD SPOKE UNTO MOSES AFTER THE DEATH OF THE TWO SONS OF AARON etc. —What is this statement intended to tell us? (i. e. why is it at all stated when God spoke this to Moses?) Rabbi Elazar ben Azariah illustrated this by a parable: It may be compared to the case of a sick person whom the physician visited. He (the physician) said to him: “Do not eat cold things nor sleep in a damp place!" Another physician came and said to him: “Do not eat cold things, nor sleep in a damp place so that thou mayest not die as Mr. So-and-so died!" Certainly this (the latter) put him on his guard more than the former; that is why Scripture states “after the death of the two sons of Aaron" (Sifra, Acharei Mot, Section 1 3).

וַיְדַבֵּ֤ר יְהֹוָה֙ אֶל־מֹשֶׁ֔ה אַחֲרֵ֣י מ֔וֹת שְׁנֵ֖י בְּנֵ֣י אַהֲרֹ֑ן בְּקׇרְבָתָ֥ם לִפְנֵי־יְהֹוָ֖ה וַיָּמֻֽתוּ׃

And the Lord spoke to Moshe after the death of the two sons of Aharon, when they came near before the Lord, and died;