One verse

Srimad Bhagavatam 11.20.2

11.20.2

वर्णाश्रमविकल्पं च प्रतिलोमानुलोमजम् । द्रव्यदेशवय:कालान् स्वर्गं नरकमेव च ॥ २ ॥

varṇāśrama-vikalpaṁ ca pratilomānulomajam dravya-deśa-vayaḥ-kālān svargaṁ narakam eva ca

varṇa-āśrama
of the varṇāśrama system
vikalpam
the variety of superior and inferior positions created by piety and sin
ca
and
pratiloma
birth in a mixed family wherein the father is inferior in social status to the mother
anuloma-jam
birth in a mixed family in which the father is superior in social status to the mother
dravya
material objects or possessions
deśa
the place
vayaḥ
one’s age
kālān
the time
svargam
heaven
narakam
hell
eva
indeed
ca
also

According to Vedic literature, the superior and inferior varieties found in the human social system, varṇāśrama, are due to pious and sinful modes of family planning. Thus piety and sin are constant points of reference in the Vedic analysis of the components of a given situation — namely the material ingredients, place, age and time. Indeed, the Vedas reveal the existence of material heaven and hell, which are certainly based on piety and sin.