'Ancestor's' in the Bible

A man of God came to Eli and said to him, "This is what the Lord says: 'Did I not plainly reveal myself to your ancestor's house when they were in Egypt in the house of Pharaoh?

I chose your ancestor from all the tribes of Israel to be my priest, to offer sacrifice on my altar, to burn incense, and to bear the ephod before me. I gave to your ancestor's house all the fire offerings made by the Israelites.

"Therefore, the LORD God of Israel has declared, "I did, in fact, say that your family and your ancestor's family would walk before me forever,' but now the LORD declares, "Far be it from me! The one who honors me I'll honor, and the one who despises me is to be treated with contempt.

The time is coming when I'll cut away at your family and your ancestor's family until there are no old men left in your family.