Narrated Yala ibn Umayyah: The Messenger of Allah ﷺ said to me: When my messengers come to you, give them thirty coats of mail, and thirty camels. I asked: Messenger of Allah, is it a loan with a guarantee of its return, or a loan to be paid back? He replied: It is a loan to be paid back.
Hadith Referenceسنن ابي داود / كتاب الإجارة / 3566
1؎ : «أعارية مضمونة» means that if the item is lost, then its price will be paid, and «أعارية مؤداة» means that if the item itself is present, then it must be returned, and if the item is lost, then there will be no obligation to pay its price.
Narrated Ya'la bin Umaiya (RA): Allah's Messenger (ﷺ) said to me, "When my messengers come to you, give them thirty coats of armor." I asked, "O Allah's Messenger, is it a loan with a guarantee (of its return), or a borrowed object that must be returned?" He replied, "No, it is a borrowed object that must be returned." [Reported by Ahmad, Abu Dawud and an-Nasa'i. Ibn Hibban graded it Sahih (authentic)].