Reference for Bava Metzia 2:8
מָצָא סְפָרִים, קוֹרֵא בָהֶן אַחַת לִשְׁלֹשִׁים יוֹם. וְאִם אֵינוֹ יוֹדֵעַ לִקְרוֹת, גּוֹלְלָן. אֲבָל לֹא יִלְמֹד בָּהֶן בַּתְּחִלָּה, וְלֹא יִקְרָא אַחֵר עִמּוֹ. מָצָא כְסוּת, מְנַעֲרָהּ אַחַת לִשְׁלֹשִׁים יוֹם. וְשׁוֹטְחָהּ לְצָרְכָּהּ, אֲבָל לֹא לִכְבוֹדוֹ. כְּלֵי כֶסֶף וּכְלֵי נְחֹשֶׁת, מִשְׁתַּמֵּשׁ בָּהֶן לְצָרְכָּן, אֲבָל לֹא לְשָׁחֳקָן. כְּלֵי זָהָב וּ כְלֵי זְכוּכִית, לֹא יִגַּע בָּהֶן עַד שֶׁיָּבֹא אֵלִיָּהוּ. מָצָא שַׂק אוֹ קֻפָּה, וְכָל דָּבָר שֶׁאֵין דַּרְכּוֹ לִטֹּל, הֲרֵי זֶה לֹא יִטֹּל:
If one found books, he reads in them once in thirty days, [for they become mouldy if they remain unopened. (All of their books were in the form of scrolls)]. And if he does not know how to read, he rolls them [from beginning to end, so that air enter.] But he should not learn in them ab initio [what he never learned before, for (in that instance) he must leave them (exposed) before him.] And another should not read with him. [For one pulls (the scroll) to him, and the other, to him, and it is torn.] If he found a garment, he shakes it out once every thirty days, and he spreads it out for its need [i.e., to air it out so that it not become moth-eaten.], but not for his honor. (If he found) vessels of silver or copper, he uses them for their need, [for they become mouldy in the ground, where he must keep them, this being their "guarding." Therefore, he uses them from time to time], but not [so long as] to wear them out. (If he found) vessels of gold or glass, he may not touch them until Eliyahu comes. [Gold does not mould in the ground, and glass, too (does not). What is more, it is easily broken.] (If he found) a sack or a box, or anything else that he does not customarily carry, [i.e., something demeaning to him], he should not take it, [it being written (Deuteronomy 22:1): "And you shall ignore them" — Sometimes you are to ignore them, as in the instance of an elder whose dignity it does not befit.]