The Levitical priesthood began with Aaron, the older brother of Moses (Exodus 28:1–3). Aaron’s descendants served as the priests in Israel, ministering in the tabernacle and, later, the temple, primarily as mediators between man and God. The Levitical priests bore the responsibility of offering the sacrifices required by the Mosaic Law. Some of the Levitical priests in the Bible are Ezra; Eli; and Zechariah, the father of John the Baptist.