I too, O chieftain, know thee well; Three worlds thy famous virtues tell; And none, I ween, with thee may vie Who spring impetuous through the sky. To every guest, though mean and low. The wise respect and honour show; And how shall I neglect thee, how Slight the great guest so near me now?

In plain words: The mountain says it knows Hanuman's fame, which all three worlds talk about, and that no one leaps through the sky like him. Wise people honour every guest, even a humble one, so it cannot ignore such a great guest.