The bullock There were, indeed, seven bullocks to be offered at his consecration, one every day; but here he mentions only one, because he here describes only the work of the first day.
Related Commentaries of Leviticus 8:14
Leviticus 8:14
14 And he brought the bullock for the sin offering: and Aaron and his sons laid their hands upon the head of the bullock for the sin offering.