Musnad Ahmad 1153:1005

'Affan narrated to us, Wuhaib narrated to us, Dawud narrated to us, from al-Sha'bi: 'Aishah said: I said, "O Messenger of Allah, when the earth is replaced by another earth, and the heavens, and they come out before Allah, the One, the Prevailing, where will the people be on that day?" He said: "Upon the Sirat (the bridge)."