It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever grants respite to someone in hardship until he is able to pay, Allah will grant him respite for his sin until he repents."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 11282