when they become aware of the sin they have committed, then the assembly must bring a young bull as a sin offering and present it before the Tent of Meeting.
KJV
When the sin, which they have sinned against it, is known, then the congregation shall offer a young bullock for the sin, and bring him before the tabernacle of the congregation.
ASV
when the sin wherein they have sinned is known, then the assembly shall offer a young bullock for a sin-offering, and bring it before the tent of meeting.