Musnad Ahmad 30:962

He said: Abd al-Razzaq narrated to us, Ma'mar narrated to us, from Ja'far al-Jazari, from Yazid ibn al-Asamm, from Abu Hurayrah, who said: The Messenger of Allah, peace and blessings of Allah be upon him, said: "If the religion were at the Pleiades, men from Persia—or the sons of Persia—would go until they attained it."