The works of Ādi Śaṅkarācārya

Sanatsujātīyam

p. 275

p. 275

तत्कथं ब्रह्मचर्यं स्यादेतद्विद्वन्ब्रवीहि मे ॥ ४ ॥

In plain words

Then how does brahmacarya actually come about? You know — tell me this.

Close to the Sanskrit

That — how would brahmacarya come to be? This, O knower, tell me.