It is narrated from Sayyiduna Hubshi bin Junadah (may Allah be pleased with him) that he heard the Messenger of Allah (peace and blessings be upon him) say: "Whoever begs without being in need, it is as though he is eating burning coals."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 3493