सङ्करो नरकायैव कुलघ्नानां कुलस्य च। पतन्ति पितरो ह्येषां लुप्तपिण्डोदकक्रियाः
saṅkaro narakāyaiva kula-ghnānāṁ kulasya cha patanti pitaro hy eṣhāṁ lupta-piṇḍodaka-kriyāḥ
Promiscuity ruins both the family and those who defile it; while the souls of our ancestors droop, due to the lack of funeral cakes and ablutions.
Translated by Shri Purohit Swami
Confusion of castes leads to hell for the slayers of the family, for their forebears fall, deprived of the offerings of rice-balls and libations of water.
Translated by Swami Sivananda
Word meanings (from the gita/gita dataset)
saṅkaraḥ—unwanted children; narakāya—hellish; eva—indeed; kula-ghnānām—for those who destroy the family; kulasya—of the family; cha—also; patanti—fall; pitaraḥ—ancestors; hi—verily; eṣhām—their; lupta—deprived of; piṇḍodaka-kriyāḥ—performances of sacrificial offerings