Musnad Ahmad 30:3444

Yazid narrated to us, Ibn Abi Dhi’b informed us, from al-Maqburi, from his father, from Abu Hurairah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "O women of the Muslims" — three times — "let no neighbor belittle for her neighbor, even if it be a sheep’s trotter." "And it is not permissible for a woman who believes in Allah and His Messenger and the Last Day to travel the distance of one day, while there is not with her a mahram."