Shloka 17
अनुशासनपर्व अध्याय ९३ — तपस्, सदोपवास, विघसाशन, अतिथिप्रियता
Austerity, regulated fasting, residual-eating, and hospitality
एतानिमान् विजानीयादपांक्तेयान् द्विजाधमान् । शूद्राणामुपदेशं च ये कुर्वन्त्यल्पचेतस:
etān imān vijānīyād apāṅkteyān dvijādhamān | śūdrāṇām upadeśaṁ ca ye kurvanty alpacetasaḥ ||
ビーシュマは言った。「これらの者は、聖なる饗宴の列に坐すにふさわしからぬ者、すなわち二度生まれのうちの卑しき者として識別されねばならぬ。浅慮にしてシュードラにヴェーダを授ける者もまた、同じくアパーンクテーヤ（列外の者）として共同の儀礼から排されるべきである。」
भीष्म उवाच
Educational Q&A
The verse defines a category of ritual and social disqualification (apāṅkteya): those considered morally/ritually fallen among the twice-born, including (in this passage’s norm-setting) Brahmins who give Vedic instruction to Śūdras, are said to be excluded from the communal sacred dining line.
In Anuśāsana Parva, Bhīṣma is delivering extended instruction on dharma—especially conduct, ritual norms, and social-religious boundaries. Here he specifies who should be treated as ‘outside the line’ (apāṅkteya) in ritual contexts.