Valmiki Ramayana 6.128.8
सुग्रीवेण च संसर्गं वालिनश्च वधं रणे ।मैथिल्यन्वेषणं चैव यथा चाधिगता त्वया॥
sugrīveṇa ca saṃsargaṃ vālinaśca vadhaṃ raṇe |maithilyanveṣaṇaṃ caiva yathā cādhigatā tvayā ||
Our plain-language meaning of this verse is waiting for scholar review.