Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) reports this as a marfu' hadith: The Prophet (peace and blessings be upon him) said: "A seal hangs from the leg of the Throne. When the rights of kinship are trampled, sins are committed and boldness is shown against Allah Almighty, Allah Almighty sends that seal, and it seals the heart of the man, and after that he (the man) understands nothing."
Al-Bazzar recorded it; its chain contains Sulayman bin Muslim al-Khashshab, who is extremely da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الفتن - أعاذنا الله منها / 12151