Musnad Ahmad 1153:1462

'Abd al-Rahman narrated to us, from Sufyan, from al-A'mash, from 'Umarah, from Abu 'Atiyyah; and Ibn Ja'far narrated to us, Shu'bah narrated to us, from Sulayman, he said: I heard Khaythamah narrating from Abu 'Atiyyah, from 'A'ishah, she said: "I truly know how the Messenger of Allah, peace and blessings of Allah be upon him, used to recite the Talbiyah: 'Labbayk Allahumma Labbayk, Labbayk la sharika laka Labbayk, inna al-hamda wa al-ni'mata laka' (Here I am, O Allah, here I am. Here I am, there is no partner for You, here I am. Indeed, all praise and grace belong to You)." Ibn Ja'far said: Then I heard her after that reciting the Talbiyah.