'Ancestor' in the Bible

"Yahweh will bring on you and on your people and on the house of your ancestor days that have not come since [the] day Ephraim departed from Judah: the king of Assyria."

"Go and say to Hezekiah, 'Thus says Yahweh, the God of David your ancestor: "I have heard your prayer; I have seen your tears. {Look, I am going to} add fifteen years to your days.

Your first ancestor sinned, and your {representatives} transgressed against me.

then you shall take your pleasure in Yahweh, and I will make you ride upon [the] heights of [the] earth, and I will feed you the heritage of Jacob your ancestor, for the mouth of Yahweh has spoken."