Bava Batra 175B

הוציא עליו כתב ידו שהוא חייב לו ⁠– גובה מנכסים בני חורין.

If one presents to a debtor a document in the handwriting of the debtor stating that he owes money to him, but without witnesses signed on the document, the creditor can collect only from unsold property.

ערב היוצא לאחר חיתום שטרות ⁠– גובה מנכסים בני חורין.

In the case of a guarantor whose commitment emerged after the signing of the promissory note, the creditor can collect the sum only from unsold property of the guarantor.

מעשה ובא לפני רבי ישמעאל, ואמר: גובה מנכסים בני חורין. אמר לו בן ננס: אינו גובה לא מנכסים משועבדים ולא מנכסים בני חורין.

The Mishnah relates: An incident occurred where such a case came before R' Yishmael, and he said: The creditor can collect the sum from unsold property of the guarantor, but not from liened property that he has sold to others. Ben Nannas said to R' Yishmael: The creditor cannot collect the sum from the guarantor at all, not from liened property that has been sold, nor from unsold property.

אמר לו: למה? אמר לו: הרי החונק את אחד בשוק, ומצאו חבירו ואמר לו ״הנח לו [ואני אתן לך]״⁠ – פטור, שלא על אמונתו הלוהו. אלא איזה הוא ערב שהוא חייב? ״הלוהו, ואני נותן לך״⁠ – חייב, שכן על אמונתו הלוהו.

R' Yishmael said to him: Why not? Ben Nannas said to him: If one was strangling someone in the marketplace, demanding repayment of a loan, and another person found him doing so and said to the attacker: Leave him alone and I will give you the money he owes, the person who intervened is exempt from paying, as the creditor did not loan the money in the first place based on his trust of the one who intervened. Rather, who is a guarantor who is obligated to repay the loan he has guaranteed? One who tells the creditor before the loan takes place: Lend money to him, and I will give you the repayment, as in that case the creditor did loan the money based on his trust of the guarantor.