Narrated Abu Hurairah (RA):

Allah's Messenger (ﷺ) said: "Delay in payment by a rich man is injustice. So, if one of you is referred for payment to a wealthy man he should accept the reference." [Agreed upon].

عَنْ أَبِي هُرَيْرَةَ ‏- رضى الله عنه ‏- قَالَ: قَالَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-{ مَطْلُ اَلْغَنِيِّ ظُلْمٌ, وَإِذَا أُتْبِعُ أَحَدُكُمْ عَلَى مَلِيٍّ فَلْيَتْبَعْ } مُتَّفَقٌ عَلَيْهِ [1]‏ .‏