तस्य his, रामस्य Rama's, शासनात् by the command, राघवभ्राता Rama's brother, सः एषः लक्ष्मणः that Lakshmna, वाक्यसारथिः his words as a charioteer, व्यवसायरथः his work a chariot, पाप्तः has come.

'By the command of Rama, his brother has come to you, Rama's words as charioteer and his work as chariot'.