Anything beyond that—such as bathing for the stoning of the jamarāt (1), for ṭawāf, or for spending the night (2) in Muzdalifah—has no foundation (3), neither (4) in the practice of the Prophet, may Allah bless him and grant him peace, nor in that of his Companions. The majority of the imams did not deem it recommended—neither (5) Mālik, nor Abū Ḥanīfah, nor Aḥmad (6)—even though (7) a group of their later followers (8) have mentioned it. In fact, it is an innovation (9), unless there is a particular reason that would make it recommended, such as a person emitting an offensive odor that harms others (10); in that case he may bathe to remove it.
All of ʿArafah is a valid place for standing, and one should not stand in the valley of ʿUranah.
Climbing the hill that is there is not part of the Sunnah. It is called “the Mount of Mercy” (11), and it is also referred to as “Ilāl,” pronounced like “Hilāl.”