question #1 Sahih al-Bukhari 1746, Book 25, Hadith 224 : What is the significance of following the leader’s actions during the Rami of the Jimar?

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).”