And the priest will take away the sin of the person who has done wrong, if the wrong was done unconsciously, and he will have forgiveness.

Offerings For Sins

Say to the children of Israel, When you have come into the land which I am giving to you for your resting-place, And are going to make an offering by fire to the Lord, a burned offering or an offering in connection with an oath, or an offering freely given, or at your regular feasts, an offering for a sweet smell to the Lord, from the herd or the flock
Numbers 15:2-3

Num 15:28 And the priest will take away the sin of the person who has done wrong, if the wrong was done unconsciously, and he will have forgiveness.
Num 15:29 The law in connection with wrong done unconsciously is to be the same for him who is an Israelite by birth and for the man from another country who is living among them.
Num 15:30 But the person who does wrong in the pride of his heart, if he is one of you or of another nation by birth, is acting without respect for the Lord, and will be cut off from his people.

Num 15:35 Then the Lord said to Moses, Certainly the man is to be put to death: let him be stoned by all the people outside the tent-circle.