Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) used to say that the Jamarat are not to be stoned on the three days until the sun has passed its zenith. And Nafi' said that Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) would stop for a long time by the first two Jamrahs, praising, glorifying and magnifying Allah Almighty, and he would not stop by Jamrat al-Aqabah, and whenever he threw a pebble at the Jamarat he would say the takbir.
It is reported from Nafi' that whenever Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) threw a pebble while stoning the Jamarat, he would say the takbir along with it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9666