Mahabharata 12.109.26

उपाध्यायं पितरं मातरं च; येऽभिद्रुह्यन्ति मनसा कर्मणा वातेषां पापं भ्रूणहत्याविशिष्टं; तस्मान्नान्यः पापकृदस्ति लोके

upādhyāyaṃ pitaraṃ mātaraṃ ca; ye'bhidruhyanti manasā karmaṇā vāteṣāṃ pāpaṃ bhrūṇahatyāviśiṣṭaṃ; tasmānnānyaḥ pāpakṛdasti loke

Our plain-language meaning of this verse is waiting for scholar review.