Standing at 'Arafah without descending to Mina beforehand

Among them: If a person enters the state of ihram for Hajj on the eighth day and proceeds to 'Arafah without descending to Mina? This is permissible, but it is contrary to the established practice.And the evidence for this: The hadith of 'Urwah ibn al-Muththarib (may Allah be pleased with him), that he came to the Prophet (peace and blessings be upon him) while he was praying Fajr in Muzdalifah and informed him that he was from the tribe of Thaqif, and that he had not left a single mountain without standing at it.So the Prophet (peace and blessings be upon him) said: (Whoever witnesses our prayer here—meaning in Muzdalifah—and stands with us until we depart, and has previously stood at 'Arafah, whether at night or during the day, has completed his Hajj and fulfilled his obligations) It does not mention staying overnight in Mina on the night of the ninth, which indicates that it is not obligatory.