One verse

Srimad Bhagavatam 11.3.45

11.3.45

नाचरेद् यस्तु वेदोक्तं स्वयमज्ञोऽजितेन्द्रिय: । विकर्मणा ह्यधर्मेण मृत्योर्मृत्युमुपैति स: ॥ ४५ ॥

nācared yas tu vedoktaṁ svayam ajño ’jitendriyaḥ vikarmaṇā hy adharmeṇa mṛtyor mṛtyum upaiti saḥ

na ācaret
does not perform
yaḥ
who
tu
but
veda-uktam
what is prescribed in the Vedas
svayam
himself
ajñaḥ
ignorant
ajita-indriyaḥ
not having learned to control his senses
vikarmaṇā
by not executing scriptural duty
hi
indeed
adharmeṇa
by his irreligion
mṛtyoḥ mṛtyum
death after death
upaiti
achieves
saḥ
he

If an ignorant person who has not conquered the material senses does not adhere to the Vedic injunctions, certainly he will engage in sinful and irreligious activities. Thus his reward will be repeated birth and death.