"jam kuber digpāl jahāṁ te" is Chaupai 15 of the Hanuman Chalisa, which Tulsidas wrote in Awadhi. It means: Yama, Kubera and the guardians of the directions cannot tell your glory in full. How could poets and scholars? Read it slowly, one half at a time, and say the Awadhi aloud.
जम कुबेर दिगपाल जहाँ ते ।कबि कोबिद कहि सके कहाँ ते ॥jam kuber digpāl jahāṁ tekabi kobid kahi sake kahāṁ te
Yama, Kubera and the guardians of the directions cannot tell your glory in full. How could poets and scholars?
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.