सुमहात्मन: of the exceedingly magnanimous, अस्य राज्ञ: this king's, अश्वमेधे महायज्ञे Aswamedha sacrifice, द्विजर्षभा: best among brahmins, ऋष्यशृङ्गम् Rsyasringa, पुरस्कृत्य led by, कर्म चक्रु: performed the rituals.
The best of brahmins led by Rsyasringa performed the rituals of aswamedha organised by the exceedingly magnanimous king.