Valmiki Ramayana 2.11.10

बलमात्मनि जानन्ती न मां शङ्कितुमर्हसि ।करिष्यामि तव प्रीतिं सुकृतेनापि ते शपे॥

balamātmani jānantī na māṃ śaṅkitumarhasi |kariṣyāmi tava prītiṃ sukṛtenāpi te śape ||

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