One verse

Srimad Bhagavatam 7.11.13

7.11.13

संस्कारा यत्राविच्छिन्ना: स द्विजोऽजो जगाद यम् । इज्याध्ययनदानानि विहितानि द्विजन्मनाम् । जन्मकर्मावदातानां क्रियाश्चाश्रमचोदिता: ॥ १३ ॥

samskara yatravicchinnah sa dvijo ’jo jagada yam ijyadhyayana-danani vihitani dvijanmanam janma-karmavadatanam kriyas casrama-coditah

samskarah
reformatory processes
yatra
wherein
avicchinnah
without interruption
sah
such a person
dvi-jah
twice-born
ajah
Lord Brahma
jagada
sanctioned
yam
who
ijya
worshiping
adhyayana
studies of the Vedas
danani
and charity
vihitani
prescribed
dvi-janmanam
of persons who are called twice-born
janma
by birth
karma
and activities
avadatanam
who are purified
kriyah
activities
ca
also
asrama-coditah
recommended for the four asramas.

Those who have been reformed by the garbhadhana ceremony and other prescribed reformatory methods, performed with Vedic mantras and without interruption, and who have been approved by Lord Brahma, are dvijas, or twice-born. Such brahmanas, ksatriyas and vaisyas, purified by their family traditions and by their behavior, should worship the Lord, study the Vedas and give charity. In this system, they should follow the principles of the four asramas (brahmacarya, grhastha, vanaprastha and sannyasa).