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 Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
तेभ्योऽग्नयः समभवन् चत्वारिंशच्च पञ्च च । त एवैकोनपञ्चाशत्साकं पितृपितामहैः
tebhyo'gnayaḥ samabhavan catvāriṃśacca pañca ca | ta evaikonapañcāśatsākaṃ pitṛpitāmahaiḥ
SB 4.1.61