It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "It is not fitting for a servant that he comes to his brother and asks him for a loan, and the brother has the means (to give) yet still refuses."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7920