Prabhu mudrika meli mukh mahin: meaning
Chaupai 19 of the Hanuman Chalisa
प्रभु मुद्रिका मेलि मुख माहीं
जलधि लाँघि गये अचरज नाहीं
prabhu mudrikā meli mukh māhīṃ / jaladhi lā̃ghi gaye acaraj nāhīṃ
With your Lord's ring held in your mouth, you leapt across the ocean, and no wonder you could.
Words
प्रभु prabhuthe Lord's
मुद्रिका mudrikāringSanskrit mudrā, a seal, and a ring carrying one.
मेलि meliplacing
मुख mukhmouth
माहीं māhīṃin
जलधि jaladhithe oceanSanskrit jala (water) plus dhi (holder).
लाँघि lā̃ghileaping overFrom Sanskrit laṅgh, to leap across.
गये gayewent
अचरज acaraja wonderAwadhi form of Sanskrit āścarya, wonder.
नाहीं nāhīṃnot
The ring and the leap
Ram gives Hanuman his ring so that Sita will trust him. Hanuman then leaps across the ocean to Lanka. The picture of him carrying the ring in his mouth comes from this verse; we have not traced that detail to Valmiki.
Source: Valmiki Ramayana, Kishkindha Kanda (the ring) and Sundara Kanda (the leap)