“There were no greater holidays for Israel than Tu Be’av and Yom Kippur, for on them the girls of Jerusalem used to go out in borrowed white dresses…and dance in the vineyards. What would they say? ‘Young man, lift up your eyes and see what you choose for yourself…’” (Babylonian Talmud, Ta’anit 26b).

This is said to be the first mention of Tu Be’av, appearing in the Mishna – and written by Rabbi Simeon ben Gamliel, who lived 70 BCE-10 CE. He was head of the Sanhedrin and a direct descendant of King David. 

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