And if one of them measured it and an outsider carried it by his order, it is as if the one who measured it carried it. If it was by the order of the other, it is as if the other carried it. If he carried it without the order of either of them, it is as if he had measured it and then carried it.

905 - Issue; He said: "And it is not permissible to hire for the duration of his military expedition."

This is the opinion of the majority of scholars, including al-Awza'i, al-Shafi'i, and the People of Reason (Ashab al-Ra'y). Malik said: "The aspect of that is known, and I hope it is valid." As for us, this is a lease for an unknown duration and an unknown labor, so it is not permissible, just as if he had hired it for the duration of his travel for trade. Because the duration of a military expedition is long and short, and it has no limit by which it is known; the work therein is little and much, and the end of their travel is near and far. Thus, estimation by it is not permissible, like other unknown travels. If he does that, he is entitled to the fair wage (ajr al-mithl) because he contracted for compensation that was not delivered to him due to the invalidity of the contract, so the fair wage became due, like all other invalid leases.

906 - Issue; He said: "If he names a known amount for each day, it is permissible."

Its summary is that whoever hires a horse for the duration of his military expedition, for one dirham each day, the text narrated from Ahmad indicates its validity. Al-Shafi'i said: This is invalid because the duration of the lease is unknown. As for us, 'Ali, may Allah be pleased with him, hired himself out for every bucket for a date, and likewise the Ansari, and the Prophet (peace and blessings of Allah be upon him) did not disapprove of it. Furthermore, every day has a known duration and wage, so it is valid, just as if he said: "I have leased it to you for a month, for one dirham each day." Or he said: "I have hired you to transport this heap (subra), for one dirham per qafiz." It is necessary to specify what he is hiring it for, either for riding or for a known load. He is entitled to the named wage for each day, whether it is stationary or traveling, because the benefits passed during its duration, so it resembles...