Leviticus 4:27 "And if anyone of the people sin unintentionally"

A person who disobeys HaShem's commandments on purpose will be punished. Among the six hundred and thirteen Mitzvot, the Torah lists forty-three forbidden acts that are punishable by Karet - premature death.

We are responsible for our deeds and must be cautious and aware of our actions. Even if a person commits any of these forbidden acts unintentionally, he must atone by bringing a sin-offering.