“One of the two Imam, ‘Alayhim al-Salam, has said that Allah, the Most Majestic, the Most Glorious, commanded Ibrahim to build al-Ka‘bah, to raise its foundations and show people how to perform the acts of their hajj. Ibrahim and Isma‘il built the House. They did it by doing a certain amount every day until they ended at the place where there is the Black Stone. Abu Ja’far has said that abu Qubays (hill), then called Ibrahim saying, ‘There is something in trust for you with me.’ It gave the Black Stone to him and he placed it in its place. Ibrahim then called people for Hajj saying, ‘O people, I am Ibrahim, the friend of Allah, and Allah commands you to perform Hajj of this House so you must perform Hajj.’ Thus, all those who up to the Day of Judgment perform Hajj answered his call. The first one who answered his call was from Yemen. He (the Imam) said, ‘Ibrahim, his family and children performed Hajj. Those who think that the person to be slaughtered was Ishaq they do so because of this.”’ It is said that abu Basir had heard this Hadith from abu Ja’far and abu ‘Abd Allah, ‘Alayhim al-Salam. These two people think that Ishaq was the one but Zurarah thinks that he was Isma‘il.