The researcher of Jewish symbols Uri Ophir quotes Rabbi Moshe Feinstein, who in the response of Igroth Moshe (section Orach Chaim 3:15) indicates that the origins of the Star of David as a Jewish symbol are unknown.
Nevertheless, Ophir himself puts forward the version that the origin of the Star of David is associated with the temple menorah. Under each of her seven lamps there was a flower: "And make a lamp of pure gold; minted and made a lamp; his hip and his stem, his cups, his ovaries and his flowers should be from him "(Exodus 25:31). Uri Ophir believes that it was a white lily flower, which in form resembles Magen David. In support of this theory, he cites the ancient translation of the Bible of Onkelos into Aramaic, where the word פרח (flower) is translated as "lily". Ophir refers to the rabbi Abraham ibn Ezra (1093-1167), who in his commentary on the Song of Songs writes that in this work the fragrant lily with its six petals (lily, Hebrew שו имеет, has the same root as the number 6 - Hebrew שש) symbolizes the Jewish people :
"I am Sharon's daffodil, the lily of the valleys! As between the thorns of the lily, so is my friend between the virgins.
(Song 2: 1-2)
"
Professor Yehuda Felix in the book "Nature and Earth Israel in the Bible" identifies the biblical lily with a white lily (Lilium candidum) - the only kind of lilies growing in these places in the wild. The petals of the white lily, as Ophir shows, are symmetrically arranged and in the expanded form form a regular six-pointed star, now known as the Star of David. The lamp was located in the center of the flower, so that the priest lit the fire as if in the center of a six-pointed star. Ophir also gives another proof of his correctness. In the third book of Kings it is told about how King Solomon ordered to put on two sides of the entrance to the Temple two huge copper columns, about 9 meters high. These columns were called Yakhin and Boaz. In the upper part of them there was a crown about two meters in diameter in the form of a lily: "And in the vestibule the crowns on the top of the pillars are made [like a lily] ... And he set the pillars to the porch of the temple; put the pillar on the right side and gave it the name of Jachin, and put the pillar on the left side and gave it the name of Boaz. And over the pillars he set [wreaths] made [like] lilies ... "(3 Samuel 7: 19-22). Ophir connects this mention with the version that in the menorah the cups had the shape of lilies, referring to the text of Maimonides (Laws of the Temple, 3: 3): "flowers [in the menorah] are the same as flowers on columns"