It was narrated that Anas bin Malik said:
"I heard the Messenger of Allah (ﷺ) say: 'Borrowed items are to be returned and an animal borrowed for milking is to be returned.' " (RU)
English reference (RU): Vol. 3, Book 15, Hadith 2399 (RU)
Arabic reference (RU): Book 15, Hadith 2490 (RU)