And Abu Bakr ibn Abi Shaybah narrated to us, saying: Abu al-Ahwas narrated to us, from Husayn, from Kathir ibn Mudrik, from Abd al-Rahman ibn Yazid, who said: Abdullah said, while we were at Jam' (Muzdalifah): I heard the one upon whom Surah al-Baqarah was revealed say at this very place: "Labbaik Allahumma labbaik" (Here I am, O Allah, here I am).