Bhagavad Gita Chapter 1.41
sańkaro narakāyaiva
kula-ghnānāḿ kulasya ca
patanti pitaro hy eṣāḿ
lupta-piṇḍodaka-kriyāḥ
Translation
An increase of unwanted population certainly causes hellish life both for the family and for those who destroy the family tradition. The ancestors of such corrupt families fall down, because the performances for offering them food and water are entirely stopped.