In Le 4 the bullock is for a sin-offering, here it is for a burnt-offering, either because they are different laws, as hath been said; or because here is added a new penalty, to breed the greater caution and diligence in the Israelites, who had given many instances, and now a fresh and eminent instance, of their heedlessness in observing the commands of God; and so, besides that bullock for a sin-offering, which he leaves to be gathered out of Leviticus 4:11, he now requires another bullock for a burnt-offering.
Related Commentaries of Numbers 15:24
Numbers 15:24
24 Then it shall be, if ought be committed by ignorance without the knowledge of the congregation, that all the congregation shall offer one young bullock for a burnt offering, for a sweet savour unto the LORD, with his meat offering, and his drink offering, according to the manner, and one kid of the goats for a sin offering.