Bachelor, Hebrew University, Jerusalem, 1964. Master of Arts, Hebrew University, Jerusalem, 1967. Doctor of Philosophy, Hebrew University, Jerusalem, 1973.
Professor of biblical studies, Hebrew U., since 1980; chairman biblical department, Hebrew U., 1982-1984; visiting professor, University of Pennsylvania, Philadelphia, 1980-1981, 1985-1986; Grinfield lecturer on Septuagint, Oxford (England) University, since 1982. Board directors Computer Assisted Tools Septuagint Studies, Jerusalem/Philadelphia.
Married Lika Aa, December 3, 1964. Children: Ophirah, Ariel, Amitai.