Musnad Ahmad 1153:1779

Waki’ narrated to us, from Isma’il ibn Abi Khalid, from Qays ibn Abi Hazim, from ‘Aishah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said during his illness in which he died: "I wish I had some of my companions with me." We said: "O Messenger of Allah, shall we not call Abu Bakr for you?" He remained silent. We said: "O Messenger of Allah, shall we not call ‘Umar for you?" He remained silent. We said: "O Messenger of Allah, shall we not call ‘Ali for you?" He remained silent. We said: "Shall we not call ‘Uthman for you?" He said: "Yes." She said: So we sent for ‘Uthman, and he came and was alone with him. He began speaking to him, and ‘Uthman’s face began to change.