Numbers 8:8

8:8 Then they are to take a young bull with its grain offering of fine flour mixed with olive oil; and you are to take a second young bull for a purification offering.

Numbers 15:24

15:24 then if anything is done unintentionally without the knowledge of the community, the whole community must prepare one young bull for a burnt offering – for a pleasing aroma to the Lord – along with its grain offering and its customary drink offering, and one male goat for a purification offering.