Nadab and Abihu were the first two sons of Aaron the Levite by his marriage to Elisheba, daughter of Amminadab from the tribe of Judah. They had four sons in total, the younger two sons being named Eleazar and Ithamar.[3] During the Exodus journey, after the Israelites' affirmation of their covenant with God,[4] Abihu and Nadab accompanied Moses, Aaron, and 70 elders up Mount Sinai. There they 'saw' God with great clarity, walking on a pavement of sapphire stone, and shared a meal in God's presence, without being harmed as a result.[5][6]