Musnad Ahmad 26:286

Yazid narrated to us, Mas'udi informed us, from al-Qasim and al-Hasan ibn Sa'd, from 'Abd al-Rahman ibn 'Abd Allah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) stopped at a place, and he mentioned the like of it, and he said: "Return it, for it is a mercy to her."