בבא קמא י׳Bava Kamma 10

Mishnah 1א׳

הַגּוֹזֵל וּמַאֲכִיל אֶת בָּנָיו, וְהִנִּיחַ לִפְנֵיהֶם, פְּטוּרִין מִלְּשַׁלֵּם. וְאִם הָיָה דָבָר שֶׁיֶּשׁ בּוֹ אַחֲרָיוּת, חַיָּבִין לְשַׁלֵּם. אֵין פּוֹרְטִין לֹא מִתֵּבַת הַמּוֹכְסִין, וְלֹא מִכִּיס שֶׁל גַּבָּאִין, וְאֵין נוֹטְלִין מֵהֶם צְדָקָה. אֲבָל נוֹטֵל הוּא מִתּוֹךְ בֵּיתוֹ אוֹ מִן הַשּׁוּק:

[If] one who stole [something] and fed it to his children, or left it in front of them, [the children] are exempt from making restitution. But if it was something which is subject to mortgage, they are liable to make restitution. One may not make change from the chest of an excise collector or from the wallet of a tax collector, or accept any charity [taken] from those places. But he may accept [charity] from them at their own house or in the market.

Mishnah 2ב׳

נָטְלוּ מוֹכְסִין אֶת חֲמוֹרוֹ וְנָתְנוּ לוֹ חֲמוֹר אַחֵר, גָּזְלוּ לִסְטִים אֶת כְּסוּתוֹ וְנָתְנוּ לוֹ כְסוּת אַחֶרֶת, הֲרֵי אֵלּוּ שֶׁלּוֹ, מִפְּנֵי שֶׁהַבְּעָלִים מִתְיָאֲשִׁין מֵהֶן. הַמַּצִּיל מִן הַנָּהָר אוֹ מִן הַגַּיִס אוֹ מִן הַלִּסְטִים, אִם נִתְיָאֲשׁוּ הַבְּעָלִים, הֲרֵי אֵלּוּ שֶׁלּוֹ. וְכֵן נָחִיל שֶׁל דְּבוֹרִים, אִם נִתְיָאֲשׁוּ הַבְּעָלִים, הֲרֵי אֵלּוּ שֶׁלּוֹ. אָמַר רַבִּי יוֹחָנָן בֶּן בְּרוֹקָה, נֶאֱמֶנֶת אִשָּׁה אוֹ קָטָן לוֹמַר, מִכָּאן יָצָא נָחִיל זֶה. וּמְהַלֵּךְ בְּתוֹךְ שְׂדֵה חֲבֵרוֹ לְהַצִּיל אֶת נְחִילוֹ. וְאִם הִזִּיק, מְשַׁלֵּם מַה שֶּׁהִזִּיק. אֲבָל לֹא יָקֹץ אֶת סוֹכוֹ עַל מְנָת לִתֵּן אֶת הַדָּמִים. רַבִּי יִשְׁמָעֵאל בְּנוֹ שֶׁל רַבִּי יוֹחָנָן בֶּן בְּרוֹקָה אוֹמֵר, אַף קוֹצֵץ וְנוֹתֵן אֶת הַדָּמִים:

If excise collectors took his donkey and gave him another donkey, or if bandits robbed him of his coat and gave him another coat, they are his own, since the original owners have despaired of [recovering] them. One who salvages something from a flood or from marauding troops or from bandits: if the owner despaired [of recovering such items], they belong to him. So too with a swarm of bees: if the owner despaired [of recovering the swarm], it belongs to him. Rabbi Yochanan ben Baroka said: "A woman or child is believed if they say, ‘The swarm of bees emerged from this place.’” And one may walk within his neighbor's field to salvage his swarm - and if [in doing so] he causes damage, he must pay for the damage that he has caused - but he may not cut off a branch of [his neighbor's] tree [to save his swarm], even on condition that he pay its value. Rabbi Yishmael, the son of Rabbi Yochanan ben Beroka, says: He may even cut off [the branch] and give [its value in] money.