Riyad as-Salihin 1611
Abu Hurairah (May Allah be pleased with him) said:
The Messenger of Allah (ﷺ) said, "It is an act of oppression on the part of a person to procrastinate in fulfilling his obligation; if the repayment of a debt due to any of you is undertaken by a rich person, you should agree to the substitution." [Al-Bukhari and Muslim] .
وعن أبي هريرة رضي الله عنه أن رسول الله صلى الله عليه وسلم قال‏:‏ ‏"‏مطل الغني ظلم وإذا أُتبع أحدكم على مليء فليتبع‏"‏ ‏(‏‏(‏متفق عليه‏.‏ معنى ‏"‏أتبع‏"‏‏:‏ أحيل‏)‏‏)‏‏.‏