Sunan an-Nasa'i, Volume 3, Book 24, Hadith 3078 (DarusSalam) ⓘ

Jafar bin Muhammad bin 'Ali bin Husain narrated that his father said: "We entered upon Jabir bin 'Abdullah and I said: 'Tell me about the Hajj of the Prophet. He said: 'The Messenger of Allah stoned the Jamart which is by the tree, with seven pebbles, saying the Takbir with eeach pebble - pebbles that were the size of data stones or fingertips. And he threw them for the bottom of the valley, then he went to the place of sacrifice in Mina."'

أَخْبَرَنِي إِبْرَاهِيمُ بْنُ هَارُونَ، قَالَ حَدَّثَنَا حَاتِمُ بْنُ إِسْمَاعِيلَ، قَالَ حَدَّثَنَا جَعْفَرُ بْنُ مُحَمَّدِ بْنِ عَلِيِّ بْنِ حُسَيْنٍ، عَنْ أَبِيهِ، قَالَ دَخَلْنَا عَلَى جَابِرِ بْنِ عَبْدِ اللَّهِ فَقُلْتُ أَخْبِرْنِي عَنْ حَجَّةِ النَّبِيِّ، صلى الله عليه وسلم ‏.‏ فَقَالَ إِنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم رَمَى الْجَمْرَةَ الَّتِي عِنْدَ الشَّجَرَةِ بِسَبْعِ حَصَيَاتٍ يُكَبِّرُ مَعَ كُلِّ حَصَاةٍ مِنْهَا حَصَى الْخَذْفِ رَمَى مِنْ بَطْنِ الْوَادِي ثُمَّ انْصَرَفَ إِلَى الْمَنْحَرِ فَنَحَرَ ‏.‏