Ezra 7:5

and Phinehas son of Eleazar, the son of Aaron, served before it.) The Israelites asked, “Should we again go out to battle against our brothers the Benjamites, or should we stop?” The LORD answered, “Fight, for tomorrow I will deliver them into your hand.”

Note that Amariah, the chief priest, will be over you in all that pertains to the LORD, and Zebadiah son of Ishmael, the ruler of the house of Judah, in all that pertains to the king. And the Levites will serve as officers before you. Act resolutely; may the LORD be with the upright!”

And Moses said to Aaron and his remaining sons, Eleazar and Ithamar, “Take the grain offering that remains from the offerings made by fire to the LORD and eat it without leaven beside the altar, because it is most holy.

The chief of the leaders of the Levites was Eleazar son of Aaron the priest; he oversaw those responsible for the duties of the sanctuary.

These were the descendants of Aaron: Eleazar his son, Phinehas his son, Abishua his son,

Later, Moses searched carefully for the goat of the sin offering, and behold, it had been burned up. He was angry with Eleazar and Ithamar, Aaron’s remaining sons, and asked,

Now these are the portions that the Israelites inherited in the land of Canaan, as distributed by Eleazar the priest, Joshua son of Nun, and the heads of the families of the tribes of Israel.

Then Moses said to Aaron and his sons Eleazar and Ithamar, “Do not let your hair become disheveled and do not tear your garments, or else you will die, and the LORD will be angry with the whole congregation. But your brothers, the whole house of Israel, may mourn on account of the fire that the LORD has ignited.