I asked Ibn `Umar, "When should I do the Rami of the Jimar?" He replied, "When your leader does that." I asked him again the same question. He replied, "We used to wait till the sun declined and then we would do the Rami (i.e. on the 11th and 12th of Dhul-Hijja)."
Sahih al-Bukhari Book 25, Hadith 224
← Previous Hadith Al-Abbas asked the permission from the Prophet (ﷺ) to stay at Mecca during the nights of Mina in order to provide water to the people, so the Prophet (ﷺ) allowed him.

Sahih al-Bukhari Book 25, Hadith 223 Next Hadith → `Abdullah, did the Rami from the middle of the valley. So, I said, "O, Abu `Abdur-Rahman! Some people do the Rami (of the Jamra) from above it (i.e. from the top of the valley)." He said, "By Him except whom none has the right to be worshipped, this is the place from where the one on whom Surat-al-Baqara was revealed (i.e. Allah's Messenger (ﷺ)) did the Rami."

Sahih al-Bukhari Book 25, Hadith 225