Shurahbil bin Muslim Al-Khawlani said:
I heard Abu Umamah Al-Bahil say: "I heard the Messenger of Allah(ﷺ) say: "The guarantor is responsible and the debt must be repaid.' " (AR)
English reference (AR): Vol. 3, Book 15, Hadith 2405 (AR)
Arabic reference (AR): Book 15, Hadith 2497 (AR)