Ibn Jurayj and Ibn Abi Sabrah said: Two men insulted each other in the presence of Sayyiduna Abu Bakr (may Allah be pleased with him), and he said nothing to them; they insulted each other in the presence of Sayyiduna Umar (may Allah be pleased with him), and he punished them to discipline them.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الأشربة والحد فيها / 17554