प्रायशश्चाचार्याः परव्यसने यातव्यमित्युपदिशन्ति ॥ कZ_०९.१.४२ ॥
prāyaśaścācāryāḥ paravyasane yātavyam ity upadiśanti
一般に師たちは、「敵が困窮(vyasana)しているときに進軍すべきである」と教える。
Exploit adversary vulnerability: initiate operations when the opponent is distracted, weakened, or administratively stressed.