It is narrated from Sayyiduna Thawban (may Allah be pleased with him) that he said: The Messenger of Allah (peace and blessings be upon him) said: "Who will guarantee me that he will not ask people for anything, and I will guarantee him Paradise?" Sayyiduna Thawban (may Allah be pleased with him) said: I will. So Sayyiduna Thawban (may Allah be pleased with him) would not ask anyone for anything.
Hadith Referenceالمعجم الكبير للطبراني / باب الثاء / 1420