When Råvaņa's son came to know that Indra was exhausted he, having bound him up by virtue of illusion, proceeded towards his army.
स तं यदा परिश्रान्तमिन्द्रं जज्ञेऽथ रावणिः। तदैनं मायया बद्ध्वा स्वसैन्यमभितोऽनयत्॥