Musnad Ahmad 1153:1810

Isma'il narrated to us, he said: Dawud informed us, from al-Sha'bi, who said: 'Aisha said: "O Messenger of Allah, have you considered when the earth is replaced by another earth, and the heavens [as well], and they appear before Allah, the One, the Prevailing—where will the people be on that day?" He said: "The people on that day will be upon the Sirat (the bridge)."