Hadith 8938

وَقَالَ : " مَطْلُ الْغَنِيِّ ظُلْمٌ ، وَإِذَا أُتْبِعَ أَحَدُكُمْ عَلَى مَلِيءٍ فَلْيَتْبَعْ " .
And the Prophet Muhammad (peace and blessings be upon him) said: Delaying repayment by a wealthy person is injustice, and when any of you is referred to a wealthy person, he should pursue him.
Hadith Reference مسند احمد / مسند المكثرين من الصحابة / 8938
Hadith Grading حکم دارالسلام: إسناده صحيح، خ: 2287، م: 1564