Matthew 26:51, The servant of the high priest…cut off his ear. Was it Peter’s (John 18:10) intention to cut of the servant’s ear or head? Some theologians suggest that Peter was going for the head, but missed and got the ear (actually it was the earlobe; see TDNT 5:543) instead.
Likely, Peter’s intended target was indeed the ear, for the servant, who was a priest himself, would have been disqualified by the Torah from serving in the temple if he had any physical defect or blemish such as a missing ear (Lev 21:18–21).
Not only that, but Peter went for the right earlobe (Luke 22:50; John 18:10), which according to the Torah (Exod 29:20) had to be anointed with blood as part of the consecration process of a priest. An improperly consecrated priest was disqualified from service in the temple as well. So by cutting off the servant’s earlobe, Peter was striking a fatal blow to his career, not to mention his ego.