One of the jokes of the late messages in Yemen. Al -Qadi Al -Siyaji wrote it, in solving the mystery of the Mawla Ishaq bin Yusuf bin Al -Mutawakkil to God Al -Zaidi, who died in (1173 AH). The answers to this invading this, except that he died without acknowledging anyone with injury. He also has a question, other than the puzzle, and he directed him to the elders of the Zaydi school, so they freed several answers, and the truth was not affected by them. Then he wrote an answer to his question, but he was not satisfied with him. This question is located in twelve houses from the Sea of ​​Sand