Valmiki Ramayana 4.39.22

नील अंजन चय आकारो नीलो नाम अथ यूथपः ।अदृश्यत महाकायः कोटिभिः दशभिः वृतः॥

nīla aṃjana caya ākāro nīlo nāma atha yūthapaḥ |adṛśyata mahākāyaḥ koṭibhiḥ daśabhiḥ vṛtaḥ ||

Our plain-language meaning of this verse is waiting for scholar review.