משנה: הָרוֹצֶה לַחֲזוֹם עָלֵי יֶרֶק לְהָקֵל מִמַּשָּׂאוֹ לֹא יַשְׁלִיךְ עַד שֶׁיְּעַשֵּׂר. הַלּוֹקֵחַ יֶרֶק מִן הַשּׁוּק וְנִמְלַךְ לְהַחֲזִיר לֹא יַחֲזִיר עַד שֶׁיְּעַשֵּׂר. שֶׁאֵינוֹ מְעֻשָּׂר אֶלָּא מִנְיָין. הָיָה עוֹמֵד וְלוֹקֵחַ וְרָאָה טוֹעַן אַחֵר יָפֶה מִמֶּנּוּ מוֹתָּר לְהַחֲזִיר מִפְּנֵי שֶׁלֹּא מָשַׁךְ.
MISHNAH: He who wants to cut off greens of vegetables in order to lighten his load should not throw them away before he tithed. He who buys vegetables on the market and then decides to return them should not return them before he tithed, because nothing is missing but counting. If he stopped to buy but saw another, better, load, he may change his mind because he did not take it up.