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