Shiva Purana
त्रयाणां क्रमशः पुत्रा देवपितृसुराश्च ते ॥ एतेषां पुत्रपौत्राश्च चत्वारिंशन्नवैव ते ॥ ४० ॥
The sons of these three sons were gradually born of the demigods, forefathers and demigods. They had forty-nine sons and grandsons.
english translation
trayANAM kramazaH putrA devapitRsurAzca te ॥ eteSAM putrapautrAzca catvAriMzannavaiva te ॥ 40 ॥
hk transliteration by Sanscript