The days of his separation; as many days as he had before separated or vowed unto God. Lost, i.e. not reckoned or imputed to him. Heb. full, to wit, to the ground, i.e. be void or of none effect.
Related Commentaries of Numbers 6:12
Numbers 6:12
12 And he shall consecrate unto the LORD the days of his separation, and shall bring a lamb of the first year for a trespass offering: but the days that were before shall be lost,d because his separation was defiled.