Mishnah Bava Metzia 6

¹If one hired craftsmen and they deceived each other, they have no legally valid complaint against each other, but only cause for complaint. If one hired a donkey-driver or a wagon-driver to bring litter-bearers or pipers for a bride or for the dead, or laborers to take his flax out of the steep, or any matter that would be lost if delayed, and they retracted, if it was a place where there were no others [who could be hired for the same wage] he may hire others at their (the original workers) expense or he may deceive them. ²If one hired craftsmen and they retracted, they are at a disadvantage. If the householder (the employer) retracted he is at a disadvantage. Whosoever changes [the conditions of a contract] is at a disadvantage. And anyone who retracts is at a disadvantage. ³If one hires a donkey to drive it through hill country and he drove it through a valley, or to drive it through the valley and he drove it through the hill country, even though the distance of each was ten miles, if the donkey died the hirer is liable. If a man hired a donkey and it went blind or was conscripted into the king’s service, the owner may say to the hirer, “Here is yours before you” [and he need not replace the donkey]. [But] if it died or was broken, he must give him a new donkey. If one hires a donkey to drive it through hill country and he drove it through a valley, if it slipped he is not liable, but if it overheated he is liable. [If one hires a donkey] to drive it through a valley and he drove it through hill country, if it slipped he is liable, but if it overheated he is not liable. But if [it overheated] due to the ascent he is liable. ⁴If one hired a cow to plow in the hill country and he plowed in the valley, if the plowshare was broken he is exempt. [If one hired a cow to plow] in the valley and he plowed in the hill country, if the plowshare was broken he is liable. [If one hired it] to thresh beans and he threshed grain [and the cow slipped and was injured], he is exempt. [If one hired it] to thresh grain and he threshed beans [and the cow slipped and was injured], he is liable. ⁵If one hired a donkey to carry wheat and he used it to carry [a like weight] of barley, he is liable [if the donkey was injured]. [If he hired it to carry] grain and he used it to carry [a like weight of] chopped straw he is liable, since the greater bulk is more difficult to carry. [If he hired it to carry] a letech of wheat and it carried a letech of barley he is not liable. But if he increased the weight, he is liable. What increase in weight renders him liable? Symmachos says in the name of Rabbi Meir: “One seah for a camel and three kavs for a donkey.” ⁶All craftsmen are accounted paid guardians. But all that have said, “Take what is yours and give me the money”, are accounted unpaid guardians. If one man said to another, “Guard that for me and I will guard this for you”, he is accounted a paid guardian. If one said, “Guard this for me”, and the other said “Put it down in front of me”, he is accounted an unpaid guardian. ⁷If one gave a loan and took a pledge he is accounted a paid guardian. Rabbi Judah says: “If he lent him money he is accounted an unpaid guardian; if he lent him produce he is accounted a paid guardian.” Abba Shaul, “One may hire out a poor man’s pledge and thereby reduce the debt, for in such a way he is like one who returns lost property.” ⁸If one moved a jar from place to place and broke it, whether he is a paid guardian or an unpaid guardian, he may take an oath [that he did not break it through neglect and be exempt from liability]. Rabbi Eliezer says: “[I too have heard that] in either case he may take an oath, but I wonder whether in either case the oath is valid.”