Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said that the Messenger of Allah (peace and blessings be upon him) said: "Whoever's intercession stands in the way of one of the hadd punishments of Allah has defied Allah in His sovereignty. Whoever dies in debt, there will be no dinar or dirham there, but only good deeds and bad deeds. Whoever knowingly disputes in support of falsehood remains under the displeasure of Allah until he desists. And whoever says about a believer something that is not in him will be confined in Radghat al-Khabal ('the reservoir of the pus and blood of the people of Hell') until he comes out of what he said."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الوكالة / 11441