CC Madhya 22.34
tavāsmīti ca yācate
abhayaṁ sarvadā tasmai
dadāmy etad vrataṁ mama
“ ‘It is My vow that if one only once seriously surrenders unto Me, saying “My dear Lord, from this day I am Yours,” and prays to Me for courage, I shall immediately award courage to that person, and he will always remain safe from that time on.’
This verse from the Rāmāyaṇa (Yuddha-kāṇḍa 18.33) was spoken by Lord Rāmacandra.