By virtue of their asceticism, this asylum is walled by trees and incapable of being conquered even by Indra, the celestials and the Asuras.
तेषामेतत्प्रभावेण दुमप्राकारसंवृतम्। आश्रमं सुदुराधर्षमपि सेन्द्रैः सुरासुरैः॥