四分律刪繁補闕行事鈔 3.394

3.394

作已，應與剃髮。先請和尚。應具儀，教云：「大德一心念！我某甲，請大德為和尚，願大德為我作和尚，我依大德故，得剃髮出家。慈愍故！」三請。其阿闍梨文，亦準此（謂剃髮及受十戒二師）。

Having done this, one should shave his hair. First, one invites the upādhyāya. He should be fully dignified in deportment, and instructed to say: 'May the Venerable One single-mindedly pay heed! I, so-and-so, invite the Venerable One to be my upādhyāya; I pray that the Venerable One will act as my upādhyāya. Relying upon the Venerable One, I am able to shave my hair and leave home. Out of compassionate sympathy!' Three requests. The text for the ācārya is also based on this (referring to the two masters for shaving the hair and receiving the ten precepts).