I do not know how many pebbles he threw at the Jamrah.
حدثنا روح حدثنا ابن جريج أخبرني أبو الزبير أنه سمع
ولا أدري بكم رمى الجمرة
No references are available.
Its chain of transmission is sahih. It has already been mentioned that Jabir specified the number of pebbles.