Musannaf Ibn Abi Shayba 37:447

Waki’ narrated to us, from al-Qasim ibn al-Fadl, from Abu Nadra, from Abu Sa’id, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "By the One in Whose hand is my soul, the Hour will not be established until wild beasts speak to humans, and until the tip of a man’s whip and the lace of his sandal speak to him, and his thigh informs him of what occurred with his family after him."