Leviticus (lih-vih-tih-kus) is the third book of both the Bible, and the Torah. In Hebrew it is known as Wayiqra' (וַיִּקְרָא), meaning 'And He will declare.' It was written by the Old Testament Patriarch Moses. Leviticus was written to the Hebrew people of Israel. The book has several main topics, some of which are the Jewish laws of sacrificing to God, and the work of the priests. These priests are sometimes known as Levites (what this book is named after).