Fire

From Slavic.info

Many Slavic national poems and customs indicate fire worship, such as Slavs of original Slavdom conceived the essence of human origin. Fire, the sun, and the mountain-top were pictured as the cauldron from which has sprung the great Slav race. Glorious the sun was conceived as provider, nourisher, and creator who, daily weaving destiny, climbed the high-hung heavens where mountains did him honor and Time and the lesser gods, dwelling in regions of snow, bowed to her.