جامع الترمذي

Narrated Mujahid: that Ibn 'Abbas said: "Do you know what is the width of Jahannam?" I said: "No." He said: "Yes, and by Allah I do not know. 'Aishah narrated to me that she asked the Messenger of ALlah (ﷺ) about Allah's saying: 'On the Day of Resurrection the whole earth will be grasped by His Hand and the heavens will be rolled up in his Right Hand (39:67).' She said: 'I said "Where will the people be on that day O Messenger of Allah?" He said: "Upon the bridge over Jahannam."