When God gave the Torah at Sinai, the Israelites did not simply accept it freely. According to Shabbat 88a, Rabbi Avdimi bar Hama bar Hasa taught that God uprooted Mount Sinai and held it over the people of Israel like an overturned barrel. He told them: "If you accept the Torah, good. If not, here will be your burial."
The image is staggering. The foundational covenant of Jewish life—the moment that defines the entire relationship between God and Israel—was, according to this reading, made under duress. The mountain hung above them like a threat.
Rav Aha bar Yaakov immediately recognized the legal implication: this provides a substantial basis to protest the Torah. A contract signed under coercion is not binding. If Israel accepted the Torah only because a mountain was suspended over their heads, they could claim the agreement was forced and therefore void.
The Talmud resolves this problem with a remarkable move. Rava said: even so, the Jewish people re-accepted the Torah voluntarily in the days of Ahasuerus. The proof is the book of Esther, which states: "The Jews confirmed and accepted" (Esther 9:27)—they confirmed what they had already accepted at Sinai. The coerced covenant at the mountain was ratified freely centuries later, in Persia, after the miracle of Purim.
A Galilean teacher added another dimension. The Torah was given as a threefold book—Torah, Prophets, and Writings—to a threefold nation—Priests, Levites, and Israelites—through Moses, who was third-born after Aaron and Miriam—in the third month, Sivan. Everything about the Torah's giving follows the pattern of three.