Vayikra 11:1

‎‎משה ואל אהרן‏ ‎‎‏ אל[AND THE LORD SPOKE] TO MOSES AND TO AARON — He spoke to Moses that he should in turn tell Aaron (cf. Rashi on Leviticus 1:1 s. v.אליו.) לאמר אליהם SAYING UNTO THEM (more lit. “to say unto them”) — He said to Aaron that he should tell it to Eleazar and Ithamar. But perhaps this is not the meaning, but it means that he should tell Israel? When, however, it states (v. 2) “Speak unto the children of Israel”, we have the command of speaking to Israel mentioned there; how then can I explain the words “to say to them?” — to say it to his sons, to Eleazar and Ithamar (Sifra, Shemini, Section 2 1).

And the Lord spoke to Moshe and to Aharon, saying to them,

וַיְדַבֵּ֧ר יְהֹוָ֛ה אֶל־מֹשֶׁ֥ה וְאֶֽל־אַהֲרֹ֖ן לֵאמֹ֥ר אֲלֵהֶֽם׃