Valmiki Ramayana 6.100.32

उभौ हि परमेष्वासावुभौ शस्त्रविशारदौ।उभावस्त्रविदां मुख्यावुभौ युद्धे विचेरतुः॥

ubhau hi parameṣvāsāvubhau śastraviśāradau |ubhāvastravidāṃ mukhyāvubhau yuddhe viceratuḥ ||

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