Hillel (born according to tradition in Babylon c. 110 BCE, died 10 CE in Jerusalem) was a Jewish religious leader, sage and scholar associated with the development of the Mishnah and the Talmud and the founder of the House of Hillel school of tannaim.
He is popularly known as the author of the saying: “If I am not for myself, who will be for me? And being for myself, what am I? And if not now, when?”