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