וּבְי֣וֹם הַבִּכּוּרִ֗ים בְּהַקְרִ֨יבְכֶ֜ם מִנְחָ֤ה חֲדָשָׁה֙ לַֽיהוָ֔ה בְּשָׁבֻעֹ֖תֵיכֶ֑ם מִֽקְרָא־קֹ֙דֶשׁ֙ יִהְיֶ֣ה לָכֶ֔ם כָּל־מְלֶ֥אכֶת עֲבֹדָ֖ה לֹ֥א תַעֲשֽׂוּ׃
Au jour des prémices, quand vous présenterez à l’Éternel l’offrande nouvelle, à la fin de vos semaines, il y aura pour vous convocation sainte: vous ne ferez aucune œuvre servile.
Mishnah Sanhedrin
[Cases concerning offenses punishable by] beating [are decided] by three. In the name of Rabbi Yishmael they said twenty-three. The intercalation of the month and intercalation of the year [are decided] by three, according to Rabbi Meir. Rabban Shimon ben Gamaliel says: “The matter is begun by three, discussed by five, and decided upon by seven. But if they decided upon it with three, the intercalation is valid.”