What is the authenticity of the hadith: “A city, one side of which is in the sea and the other side is on land, will not see the Hour until seventy thousand from the descendants of Isaac attack it”?

The questioner : There is a hadith about a city, one side of which is in the sea and the other side is on land, which is what we are asking about. It states that the Hour will not come until seventy thousand from the descendants of Isaac attack it. It says that the people of Persia are the descendants of Isaac.

The Shaykh : Allah knows best.

The questioner : It is not known. As far as we are concerned, who the descendants of Isaac are in this narration is not known.

The Shaykh : We do not know.