'Ancestor' in the Bible

Now a man of God came to Eli and said to him: "Thus says Yahweh: 'Did I not clearly reveal myself to the house of your ancestor when they were in Egypt under the house of Pharaoh?

And I chose him from all the tribes of Israel to be a priest to me, to go up to my altar, to burn incense, and to bear an ephod before me. I gave to the house of your ancestor all the offerings made by fire by the {Israelites}.

Therefore,' {declares} Yahweh the God of Israel, 'though I solemnly said that your house and the house of your ancestor would walk before me forever, but now,' {declares} Yahweh, 'far be it from me, for those who honor me I will honor, but those who despise me, I will treat with contempt!

Look, days [are] coming when I will cut off your {strength} and the {strength} of the house of your ancestor {so that no one in your house will live to old age}.