Aswad (may Allah have mercy on him) said that when delegations came to Sayyiduna Umar (may Allah be pleased with him), he would ask them: Does your governor visit the sick? Does he accept the invitation of a slave? What is his conduct? Who stands at his door? If they answered no regarding any one of these qualities, he would remove that governor.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب آداب القاضي / 20296