Numbers 15:28

15:28 The priest shall make atonement for the soul who errs, when he sins unwittingly, before Yahweh, to make atonement for him; and he shall be forgiven.
-World English Bible

Other Translation

15:28 And the priest shall make an atonement for the soul that sinneth ignorantly, when he sinneth by ignorance before the LORD, to make an atonement for him; and it shall be forgiven him.
-King James Version