Musnad Abu Ya'la al-Mawsili 159:35

Abu Khaythama narrated to us, Sufyan narrated to us, from Abu al-Zinad, from al-A'raj, from Abu Hurayrah, who said: The Messenger of Allah (ﷺ) said: "Delaying [payment of debt] by the wealthy is injustice. And if one of you is referred to a solvent person, then let him accept the transfer."