From Sahih Muslim (Hadith 3094):
Abd al-Rahman b. Yazid and al-Aswad b. Yazid reported:We heard 'Abdullah b. Mas'ud saying to the gathering of people (at Muzdalifa) that he had heard Talbiya from him, upon whom Surah al-Baqara was revealed, at this very place. And so he ('Abdullah b. Mas'ud) pronounced Talbiya and we also pronounced it with him
Reference: Muslim 3094