Exodus 29:15

Thou shalt also take one ram
One of the two he was bid to take, ( Exodus 29:1 ) ;

and Aaron and his sons shall put their hands upon the head of the ram;
confessing their sins, acknowledging their guilt, and by this act transferring the same to the ram, which was to be a burnt offering, and was typical of the imputation of sin to Christ, as before observed.