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.' " (FR)
English reference (FR): Vol. 3, Book 15, Hadith 2399 (FR)
Arabic reference (FR): Book 15, Hadith 2490 (FR)