The Yamadūtas continued: Since there are many different karmīs, or workers, there may be different judges or rulers to give them justice, but just as one central emperor controls different departmental rulers, there must be one supreme controller to guide all the judges.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
किन्तु शास्तृबहुत्वे स्याद्बहूनामिह कर्मिणाम् । शास्तृत्वमुपचारो हि यथा मण्डलवर्तिनाम्
kintu śāstṛbahutve syādbahūnāmiha karmiṇām | śāstṛtvamupacāro hi yathā maṇḍalavartinām
SB 6.3.6