This lamp (menorah), also depicted on the coat of arms of Israel, is, according to the generally accepted opinion, a seven-branched candlestick. But candles in the form we are used to seeing them appeared only in the Middle Ages, around the 15th century. The prototype of the candles was bowls filled with oil or fat, with a sliver as a wick (later they began to use wicks made of fiber or fabric). In the description of the making of the menorah in the Bible, the cup-shaped ending of its branches is also clearly indicated …
So, in fact, a menorah is a few bowls, fixed on a single base, a kind of analogue of bowls with fire in Zoroastrian temples. Standard cleansing rituals in the Pozoroastrian style included testing by fire and cleansing with water. It is about those traditions that the proverb says: "Go through fire, water and copper pipes."
In the temples of the Zoroastrians, fire burned in bowls constantly, the same happened in the Roman temples of Vesta, in our time this tradition is also often found, being transformed into memorials of the eternal flame.
One of the most important rituals in Christianity is the descent of the Holy Fire, a ritual very similar to the Zoroastrian tradition, where there was a whole table of ranks of different types of fire.
According to legend, a special miracle happened every day with one of the seven lamps of the Menorah, the "Western lamp" (Ner ha-Maaravi). This probably meant the middle lamp closest to the west of the three eastern lamps. This lamp was also called Ner Elohim ("Lamp of the Most High"). The same amount of oil was poured into it as into other lamps, but the priest who came in the morning to cleanse the Menorah after the night burning, always found this lamp still burning, and the other six - extinguished. Opinions differ in the Talmud about the magnitude of the miracle: some believe that the western lamp burned until noon; others that it burned all day and in the evening the priest lit the rest of the lamps from the still burning "Western lamp"; and according to some opinions, the "Western Lamp" had to be lit only once a year. Talmud tells,that this miracle ended 40 years before the destruction of the Second Temple.