Islam'Allah is the light of the heavens and the earth': the parable of the lamp in Surah An-Nur
In verse 35 of Surah An-Nur, God describes His light through a lamp in a niche, a glass like a shining star and oil from a blessed olive tree; writing in Desh Rupantor, Maimuna Jannat Maisara explains it as the source of faith and guidance.