Sunan an-Nasa'i, Volume 3, Book 24, Hadith 2999 (DarusSalam) ⓘ

It was narrated from Muhammad bin Ibrahim At-Taimi that a man amonth them who was called Abdulr-Rahman bin Muadh said: The Messenger of Allah addressed us in Mina, and Allah enabled us to hear hwat he said when we were in our encampments. The Prophet started to teach them their rituals until he reached the Himar (Stoning the pillars), and he said: look for pebbles the size of date stones or fingertips. And he told the Muhajirun to camp in front of the Masjid and the Ansar to camp behind the Masjid.

أَخْبَرَنَا مُحَمَّدُ بْنُ حَاتِمِ بْنِ نُعَيْمٍ، قَالَ أَنْبَأَنَا سُوَيْدٌ، قَالَ أَنْبَأَنَا عَبْدُ اللَّهِ، عَنْ عَبْدِ الْوَارِثِ، - ثِقَةٌ - قَالَ حَدَّثَنَا حُمَيْدٌ الأَعْرَجُ، عَنْ مُحَمَّدِ بْنُ إِبْرَاهِيمَ التَّيْمِيِّ، عَنْ رَجُلٍ، مِنْهُمْ يُقَالُ لَهُ عَبْدُ الرَّحْمَنِ بْنُ مُعَاذٍ قَالَ خَطَبَنَا رَسُولُ اللَّهِ صلى الله عليه وسلم بِمِنًى فَفَتَحَ اللَّهُ أَسْمَاعَنَا حَتَّى إِنْ كُنَّا لَنَسْمَعُ مَا يَقُولُ وَنَحْنُ فِي مَنَازِلِنَا فَطَفِقَ النَّبِيُّ صلى الله عليه وسلم يُعَلِّمُهُمْ مَنَاسِكَهُمْ حَتَّى بَلَغَ الْجِمَارَ فَقَالَ بِحَصَى الْخَذْفِ وَأَمَرَ الْمُهَاجِرِينَ أَنْ يَنْزِلُوا فِي مُقَدَّمِ الْمَسْجِدِ وَأَمَرَ الأَنْصَارَ أَنْ يَنْزِلُوا فِي مُؤَخَّرِ الْمَسْجِدِ ‏.‏