Musnad Ahmad 932:18

Zakariya ibn 'Adi and Ahmad ibn 'Abd al-Malik al-Harrani narrated to us, 'Ubayd Allah ibn 'Amr narrated to us, from 'Abd Allah ibn Muhammad ibn 'Aqil, from al-Tufayl ibn Ubayy, from his father, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Were it not for the emigration, I would have been a man from the Ansar. And if the people traveled through a mountain pass, or he said: a valley, I would be with the Ansar."