Musnad Ahmad 30:388

Yazid narrated to us, Ibn 'Awn informed us, Abu Muhammad 'Abd al-Rahman ibn 'Ubayd narrated to me, from Abu Hurayrah, who said: "I was with the Messenger of Allah, peace and blessings of Allah be upon him, at a funeral. Whenever I walked, he would get ahead of me, so I would jog. Then, when I jogged, he would get ahead of me. He turned to a man beside me, and I said: 'The earth is folded for him, and he is the intimate friend (Khalil) of Ibrahim.'"