הִשָּׁ֣מֶר לְךָ֡ פֶּן־יִהְיֶ֣ה דָבָר֩ עִם־לְבָבְךָ֨ בְלִיַּ֜עַל לֵאמֹ֗ר קָֽרְבָ֣ה שְׁנַֽת־הַשֶּׁבַע֮ שְׁנַ֣ת הַשְּׁמִטָּה֒ וְרָעָ֣ה עֵֽינְךָ֗ בְּאָחִ֙יךָ֙ הָֽאֶבְי֔וֹן וְלֹ֥א תִתֵּ֖ן ל֑וֹ וְקָרָ֤א עָלֶ֙יךָ֙ אֶל־יְהוָ֔ה וְהָיָ֥ה בְךָ֖ חֵֽטְא׃
Guarda-te, para que não haja pensamento vil no teu coração, dizendo: "Aproxima-se o sétimo ano, o ano da remissão", e os teus olhos sejam maus contra o teu irmão necessitado, e não lhe dês nada, e ele clame ao Eterno contra ti, e isso será pecado para ti.
Mishnah Moed Katan
They may write the following documents during the festival: Betrothal of women [documents], divorce documents and receipts, wills of a dying person, bequests and prosbols; evaluation certificates and orders for support, documents of halitzah and of repudiation [of marriage] and arbitration records; decrees of the court and correspondence.
Mishnah Megillah
On Pesah we read from the portion of the festivals in Leviticus (Torat Kohanim) (Leviticus 23:4). On Shavuot, “Seven weeks” (Deuteronomy 16:9). On Rosh Hashanah “On the seventh day on the first of the month” (Leviticus 23:2. On Yom Hakippurim, “After the death” (Leviticus. On the first day of the Festival [of Sukkot] they read from the portion of the festivals in Leviticus, and on the other days of the Festival [of Sukkot] the [sections] on the offerings of the Festival.
Mishnah Gittin
A widow is paid back [her kethubah] from the property of orphans only by taking an oath. [When the court] refrained from imposing an oath on her, Rabban Gamaliel the Elder established that she could take any vow which the orphans wanted and collect her kethubah. Witnesses sign their names on a get because of tikkun olam. Hillel instituted the prosbul because of tikkun olam.