Valmiki Ramayana Sundara Kanda Sarga 48 Shloka 49

अथ and then, वीरः hero, इन्द्रजित्तु Indrajit, द्रुमचीरबद्धम् bound by bark rope, तम् him, कपिसत्तमम् foremost of vanaras, अस्त्रेण by astra, विमुक्तम् released, विचार्य thinking, चिन्ताम् thought, जगाम started, अन्येन by other, बद्धः bound, अस्त्रम् astra, नानु वर्तते हि indeed does not follow.

Then the heroic Indrajit coming to know that the foremost of the monkeys bound by bark ropes was released from the bondage of Brahmastra, thought, 'indeed the divine weapon does not tolerate other bonds, so the vanara is released'.