Finders may not keep what others lost
Finding something gives no right to keep it: the Law commands that lost goods be returned even to an enemy, and still more to someone who fled from the invaders.
Let no one deceive himself, nor plead that he found the goods; for not even a finder may make a profit. For Deuteronomy says: “If you see your brother’s calf or his sheep straying on the road, do not ignore them; you shall surely bring them back to your brother. And if your brother is not near you, and you do not know him, you shall gather them in, and they shall stay with you until your brother looks for them, and you shall give them back to him. You shall do the same with his donkey, the same with his garment, and the same with anything your brother loses—whatever is lost by him and you find” (Deuteronomy 22:1–3). So says Deuteronomy. And in Exodus this holds not only when someone finds what belongs to his brother but also what belongs to his enemy: “You shall surely bring them back,” it says, “to the house of their owner” (Exodus 23:4).
If, then, it is not allowed to profit from a brother or an enemy who in time of peace is careless, living in comfort, and neglecting his own goods, how much less from one who is in misfortune, fleeing from enemies, and forced by necessity to abandon his own goods?
Greek
Μηδεὶς ἐξαπατάτω ἑαυτόν; μήτε ὡς εὑρών, οὔτε γὰρ εὑρόντι κερδαίνειν ἔξεστι. Φησὶ γὰρ τὸ Δευτερονόμιον· Μὴ ἰδὼν τὸν μόσχον τοῦ ἀδελφοῦ σου καὶ τὸ πρόβατον πλανώμενα ἐν τῇ ὁδῷ ὑπερίδῃς αὐτά· ἀποστροφῇ ἀποστρέψεις αὐτὰ τῷ ἀδελφῷ σου. Ἐὰν δὲ μὴ ἐγγίζῃ ὁ ἀδελφός σου πρὸς σέ, μηδὲ ἐπίστασαι αὐτόν, συνάξεις αὐτὰ καὶ ἔσται μετὰ σοῦ, ἕως ἂν ἐκζητήσῃ αὐτὰ ὁ ἀδελφός σου καὶ ἀποδώσεις αὐτῷ. Καὶ οὕτω ποιήσεις τὸν ὄνον αὐτοῦ, καὶ οὕτω ποιήσεις τὸ ἱμάτιον αὐτοῦ, καὶ οὕτω ποιήσεις κατὰ πᾶσαν ἀπώλειαν τοῦ ἀδελφοῦ σου, ὅσα ἂν ἀπόληται παρ᾿ αὐτοῦ, καὶ εὑρήσῃς αὐτὰ. Ταῦτα τὸ Δευτερονόμιον. Ἐν δὴ τῇ Ἐξόδῳ, οὐ μόνον ἐὰν τὰ τοῦ ἀδελφοῦ τις εὕρῃ, ἀλλὰ καὶ τοῦ ἐχθροῦ· Ἀποστροφῇ, φησὶν, ἀποστρέψεις αὐτὰ εἰς τὸν οἶκον τοῦ κυρίου αὐτῶν. Εἰ δὲ ἐν εἰρήνῃ ῥᾳθυμοῦντος καὶ τρυφῶντος καὶ τῶν ἰδίων ἀμελοῦντος ἀδελφοῦ ἢ ἐχθροῦ κερδάναι οὐκ ἔξεσται, πόσῳ μᾶλλον δυστυχοῦντος καὶ πολεμίους φεύγοντος καὶ κατὰ ἀνάγκην τὰ ἴδια ἐγκαταλείποντος;