 By the 2nd century CE, the term had come to refer to a clergyman who taught religious subjects, and the term appears to have commanded greater prestige than it does today.In the late 3rd century inscription at the Ka'ba-ye Zartosht, the high-priest Kartir refers to himself as "hērbad".There is some evidence that suggest that already by the 6th century, "hērbad"s performed advanced theological tasks, including translations and interpretation of Avestan texts.