Reference for Sheviit 10:6

אֵין כּוֹתְבִין פְּרוֹזְבּוּל אֶלָּא עַל הַקַּרְקַע. אִם אֵין לוֹ, מְזַכֶּה הוּא בְּתוֹךְ שָׂדֵהוּ כָּל שֶׁהוּא. הָיְתָה לוֹ שָׂדֶה מְמֻשְׁכֶּנֶת בָּעִיר, כּוֹתְבִין עָלֶיהָ פְּרוֹזְבּוּל. רַבִּי חֻצְפִּית אוֹמֵר, כּוֹתְבִין לָאִישׁ עַל נִכְסֵי אִשְׁתּוֹ, וְלַיְתוֹמִים עַל נִכְסֵי אַפּוֹטְרוֹפִּין:

A <i>Pruzbul</i> must be written with land [as collateral]. If he [the borrower] does not own [land], he [the lender] should give him [the borrower] any amount from his field. If he has a field under lien in a city; a <i>Pruzbul</i> may be written with it. Rabbi Chutzpit says, we may write one for a man with the property of his wife [as collateral]; or for orphans with the property of their guardian.

Jastrow

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