उपनीयं गुरुः शिष्यं शिक्षयेत्शौचमादितः । आचारमग्निकार्यं च सन्ध्यौपासनमेव च ॥ ६९ ॥
sanskrit
Having performed the (rite of) initiation, the teacher must first instruct the (pupil) in (the rules of) personal purification, of conduct, of the fire-worship, and of the twilight devotions.
english translation