There is nothing unknown to him, O Rāghava is the three worlds. Formerly for some reasons he had travelled all over them.
नहि तस्यास्त्यविज्ञातं त्रिषु लोकेषु राघव। सर्वान् परिवृतो लोकान् पुरा वै कारणान्तरे॥