佛說目連問戒律中五百輕重事經 2.130

2.130

問：「一切師得呼為和尚不？稱為弟子不？」答：「不得。正可敬重，如俗中之尊。」

Question: "May all teachers be called upādhyāya, and may one refer to oneself as their disciple?" Answer: "One may not. One may properly respect them just as one respects elders in secular society."