The Beginnings of the Priesthood (Leviticus 8:1 to Leviticus 10:20).
In these Chapter s Aaron and his sons are installed by Moses as priests on earth, with Aaron as ‘the Priest' (Leviticus 8). This can be compared with how Christ installs all Who come to Him as priests, in order that they may be worshippers of God and His ministers to the world. These new priests then carry out their first duties which God seals in a miraculous way (Leviticus 9), but sadly pride will overcome two of Aaron's sons and they will be smitten by God which causes Aaron great grief (Leviticus 10). High privilege in the things of God brings great responsibility.
‘And Yahweh spoke to Moses, saying,'
The chapter begins with these words. They probably indicate a new revelation from God to Moses at this point, rather than just a continuation link. However, either way we are being assured that the words that follow are those spoken by God to Moses.