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

Expressions researched:
"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"

Srimad-Bhagavatam

SB Canto 4

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.

SB 4.1.61, Translation and Purport

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.

The grandfather is Agni, and the sons are Pāvaka, Pavamāna and Śuci. Counting these four, plus forty-five grandsons, there are altogether forty-nine different fire-gods.