Commentaries:
Jamieson, Fausset, and Brown
if aught be committed by ignorance—The Mosaic ritual was complicated, and the ceremonies to be gone through in the various instances of purification which are specified, would expose a worshipper, through ignorance, to the risk of omitting or neglecting some of them. This law includes the stranger in the number of those for whom the sacrifice was offered for the sin of general ignorance.
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