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 29:14

29:14 Their grain offering must be of finely ground flour mixed with olive oil, three-tenths of an ephah for each of the thirteen bulls, two-tenths of an ephah for each of the two rams,