Maliks Muwatta Book 20, Hadith Number 221.
Section : Stoning the Jamras.
Yahya related to me from Malik from Nafi that Abdullah ibn Umar used to stop for a long time at the first two jamras saying, “Allah is greater”, “Glory be to Allah”, “Praise be to Allah”, and making duas to Allah, but he did not stop at the jamrat al-Aqaba.