“A priesthood developed gradually in the early Christian church as first bishops and then elders, or ‘presbyters,’ began to exercise certain priestly functions, mainly in connection with the celebration of the Eucharist. By the end of the 2nd century, the church’s bishops were called priests (Latin: sacerdos)… The development of eucharistic theology resulted in a further emphasis of the priest’s supernatural powers and qualities…”
https://www.britannica.com/topic/priest-Christianity
“Although the term ‘priest’ (Greek hiereus) refers to the entire Christian people, it is given to no church office in the New Testament. First appearing in the 2nd century, the office is associated with the establishment of the eucharistic sacrifice, over which the priest was called to preside. No doubt the development of the monarchical episcopate also contributed to the emergence of the priesthood…”
https://www.britannica.com/topic/priest-Christianity
“Although the term ‘priest’ (Greek hiereus) refers to the entire Christian people, it is given to no church office in the New Testament. First appearing in the 2nd century, the office is associated with the establishment of the eucharistic sacrifice, over which the priest was called to preside. No doubt the development of the monarchical episcopate also contributed to the emergence of the priesthood…”
https://www.britannica.com/topic/Roman-Catholicism/Structure-of-the-church
