1 Samuel 2:27-28

27A servant of God came and he spoke to Eli. This is what he said: ‘The Lord says, “A long time ago, when your ancestors were in Egypt, I showed myself to them. At that time they were slaves of Egypt's king.

28I chose your ancestor, Aaron, out of all the tribes of Israel. I chose him and his descendants to be my priests. I chose them to offer sacrifices on my altar, to burn incense and to wear the special ephod. I also gave them authority to eat part of the sacrifices and burnt offerings that the Israelites offered to me.