A young bullock and seven rams - He who could provide these for his own consecration was received into the order of this spurious and wicked priesthood. Some think he who could give to Jeroboam a young bullock and seven rams, was thereby received into the priesthood; this being the price for which the priesthood was conferred. The former is most likely.
Seven rams - “A bullock and two rams” was the offering which God had required at the original consecration of the sons of Aaron Exodus 29:1; Leviticus 8:2. Jeroboam, for reasons of his own, enlarged the sacrifice, and required it at the consecration of every priest.