Jerusalem Talmud Kilayim 5.5

משנה: הָרוֹאֶה יֶרֶק בַּכֶּרֶם וְאָמַר כְּשֶׁאַגִּיעַ לוֹ אֲלַקְּטֶנּוּ מוּתָּר. כְּשֶׁאַחְזוֹר אֲלַקְּטֶנּוּ. אִם הוֹסִיף בְּמָאתַיִם אָסוּר.

MISHNAH: If somebody sees a vegetable in his vineyard and says, when I get to it I shall remove it, that is permitted; when I return I shall remove it, if in the meantime it increased by one twohundredth it is forbidden.

הלכה: רִבִּי יוֹסֵי בַּר חֲנִינָא אָמַר בְּפוֹעֵל שָׁנוּ.

HALAKHAH: Rebbi Yose ben Ḥanina said, they taught about the worker.

בַּעַל הַבַּיִת שֶׁהוּא עָסוּק בִּמְלַאכְתּוֹ עָשׂוּ אוֹתוֹ כְּפוֹעֵל. בַּעַל הַבַּיִת שֶׁקִּיֵים יַרְקוֹת שָׂדֶה בְּכֶרֶם אֲסוּרִין בֵּין לוֹ בֵּין לְאַחֵר. פּוֹעֵל שֶׁקִּיֵים יַרְקוֹת שָׂדֶה בְּכֶרֶם אָסוּר לוֹ וּמוּתָּר לְכָל אָדָם. וְקַשְׁיָא אִם אָסוּר לוֹ יְהֵא אָסוּר לְכָל אָדָם. אִם מוּתָּר לְכָל אָדָם יְהֵא מוּתָּר לוֹ. אֶלָּא כְרִבִּי שִׁמְעוֹן דְּאָמַר אֵין אָדָם מַקְדִּישׁ דָּבָר שֶׁאֵינוֹ שֵׁלּוֹ. אַף עַל גַּב דְּרִבִּי שִׁמְעוֹן אָמַר אֵין אָדָם מַקְדִּישׁ דָּבָר שֶׁאֵינוֹ שֵׁלּוֹ. מוֹדֶה הוּא הָכָא שֶׁאָסוּר לוֹ (בְּעָלֶה קָטָן אֶחָד) [בְּלִקְּטָן אַחֵר] אֲבָל אִם לִיקֵּט הוּא אָסוּר בֵּין לוֹ בֵּין לְכָל אָדָם.

They gave the owner occupied with his work the status of a farmhand. If the owner kept field vegetables [growing] in his vineyard, they are forbidden to him and to others. If a farmhand kept field vegetables [growing] in the vineyard, they are forbidden to him but are permitted to everybody else. This is difficult. If they are forbidden to him, they should be forbidden to everybody. If they are permitted to everybody else, they should be permitted to him. It must follow Rebbi Simeon who says that nobody may sanctify anything that is not his own property. Even though Rebbi Simeon says that nobody may sanctify anything that is not his own property, he agrees here that it is forbidden to him if another person harvested it; but if he himself harvested, it is forbidden to him and to everybody else.

וְאִם הוֹסִיף בְּמָאתַיִם אָסוּר. דְּבֵי רִבִּי יַנַּאי מְשַׁעֲרִין בְּהָדֵין יַרְבּוּזָה. כֵּיצַד הוּא בוֹדֵק. רַב בִּיבִי בְשֵׁם רִבִּי חֲנִינָה לוֹקֵט אֶחָד וּמֵנִיחַ אֶחָד מַה שֶׁזֶּה פּוֹחֵת זֶה מוֹסִיף.

“If it increased by one twohundredth it is forbidden.” Those of the house of Rebbi Yannai estimate by purslain. How does one check? Rav Vivian in the name of Rebbi Ḥaninah: He takes one out and leaves one in [the ground]; what the first one is less, the other did increase.