Musannaf Ibn Abi Shayba 36:319

Yahya ibn Sa'id narrated to us, from Muhammad ibn Abi Yahya, from his father, from Abu Sa'id, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said on the day of al-Hudaybiyah: "Do not kindle a fire at night." Then he said: "Kindle [it] and make use of it, for no people after you will ever reach your mudd or your sa'."