Ramayana
तं पुत्रं पूर्वंकं राज्ये निक्षिप्य भुवि दुर्जयम् । पृथिव्यां राजवंशानां भव कर्तेत्युवाच ह ॥ 7-79-6 ॥
Having established that son, the foremost and invincible upon the earth, in the kingship, Manu said to him, "Be the founder of the royal lineages upon this earth."
english translation