One verse

Srimad Bhagavatam 9.9.40

9.9.40

अश्मकाद्ब‍ालिको जज्ञे य: स्त्रीभि: परिरक्षित: । नारीकवच इत्युक्तो नि:क्षत्रे मूलकोऽभवत् ॥ ४० ॥

asmakad baliko jajne yah stribhih pariraksitah nari-kavaca ity ukto nihksatre mulako ’bhavat

asmakat
from that son named Asmaka
balikah
a son named Balika
jajne
was born
yah
this child Balika
stribhih
by women
pariraksitah
was protected
nari-kavacah
having a shield of women
iti uktah
was known as such
nihksatre
when there were no ksatriyas (all ksatriyas having been vanquished by Parasurama)
mulakah
Mulaka, the progenitor of the ksatriyas
abhavat
he became.

From Asmaka, Balika took birth. Because Balika was surrounded by women and was therefore saved from the anger of Parasurama, he was known as Narikavaca (one who is protected by wome). When Parasurama vanquished all the ksatriyas, Balika became the progenitor of more ksatriyas. Therefore he was known as Mulaka, the root of the ksatriya dynasty.