Do not keep the fire burning in your homes when you go to bed
Authentic hadithعن ابن عمر رضي الله عنهما مرفوعاً: «لا تَتْرُكُوا النار في بيوتكم حين تنامون».
Ibn ‘Umar (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "Do not keep the fire burning in your homes when you go to bed."
Explanation
Meaning of the Hadīth: The Prophet (may Allah's peace and blessings be upon him) prohibits his Ummah from sleeping before putting out the fire that they lit.
Source · Narrated by Bukhari & Muslim
From the Hadith Encyclopedia (hadeethenc.com).