Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) narrates: On the day of al-Hudaybiyah, the Prophet (peace and blessings be upon him) said: "Do not light fires at night." After that the Prophet (peace and blessings be upon him) said: "Light fires and do as you wish, for no people (or enemy) after you will attain your sa' or your mudd."
Ahmad recorded it, and its narrators are thiqat (trustworthy).