"prabhu mudrikā meli mukh māhīṁ" is Chaupai 19 of the Hanuman Chalisa, which Tulsidas wrote in Awadhi. It means: With the Lord's ring in your mouth you leapt over the ocean. That is no wonder. Before the search parties leave, Rama touches Hanuman's head and gives him his ring. At the ocean, Hanuman goes like Rama's unfailing arrow.
Awadhi text: Goswami Tulsidas, Gita Press reading, checked against three Gita Press printings and Rambhadracharya's Mahaviri. English meaning and word glosses: Wisdom's own, following the traditional reading, edited by Ankur Shukla.