This page explains the Akhand Jyot tradition and a short peace prayer. Not every household is required to maintain a nine-day flame. Ask within your tradition about a specific vow, and do not maintain an open flame when safe supervision is unavailable. The linked existing PDF is in Hindi.

How to keep the lamp
Brass or clay lamp, ghee or sesame oil, cotton wick, metal tray, away from curtains. Do not pour oil onto a live flame.

Shanti mantra
Om shanti, three times, then the short sarve bhavantu line. Full text is in the PDF. If the flame dies, relight — do not panic.
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Advice: overnight flames and interruptions
Do not leave a burning diya unattended while sleeping or away. If it goes out, check the surroundings and allow the vessel to cool before handling it. Never pour fuel onto a live flame. Religious worry is not a reason to continue an unsafe arrangement.
What to do if the Akhand Jyot goes out: full guide and FAQs
General cultural and safety information. Practices vary, and prayers cannot guarantee outcomes. In a fire emergency, leave safely and contact local emergency services.