It was narrated from 'Amr bin Shu'aib, from his father, that his grandfather said:
"The Messenger of Allah (ﷺ) said: 'Whoever is entrusted with an item for safekeeping, is not responsible for it (so long as he is not negligent).' "
English reference: Vol. 3, Book 15, Hadith 2401
Arabic reference: Book 15, Hadith 2492