One verse

Srimad Bhagavatam 4.1.61

4.1.61

तेभ्योऽग्नय: समभवन्चत्वारिंशच्च पञ्च च । त एवैकोनपञ्चाशत्साकं पितृपितामहै: ॥ ६१ ॥

tebhyo ’gnayah samabhavan catvarimsac ca panca ca ta evaikonapancasat sakam pitr-pitamahaih

tebhyah
from them
agnayah
fire-gods
samabhavan
were produced
catvarimsat
forty
ca
and
panca
five
ca
and
te
they
eva
certainly
ekona-pancasat
forty-nine
sakam
along with
pitr-pitamahaih
with the fathers and grandfather.

From those three sons another forty-five descendants were generated, who are also fire-gods. The total number of fire-gods is therefore forty-nine, including the fathers and the grandfather.