Musnad Ahmad 30:3429

Yazid and Abu Abd al-Rahman narrated to us, Yazid said: Al-Mas'udi informed us, from Muhammad, the freed slave of the family of Talhah, from Isa ibn Talhah, from Abu Hurayrah, from the Prophet, peace and blessings of Allah be upon him, who said: "No one who wept out of fear of Allah will enter the Fire, until the milk returns to the udder. And the dust in the path of Allah and the smoke of Hell will never gather in the nostrils of a person." And Abu Abd al-Rahman al-Muqri said: "In the nostrils of a Muslim, ever."