Shiva Purana
पुनः कल्पांतरे वृत्ते ब्रह्मपुत्रः सजायते । पुनश्च तपसा दीप्तः क्रमान्मुक्तो भविष्यति ५८ ।
In the Next Kalpa he will be born as Brahma’s son. Becoming illuminated with the penance he shall be ultimately liberated.
english translation
punaH kalpAMtare vRtte brahmaputraH sajAyate । punazca tapasA dIptaH kramAnmukto bhaviSyati 58 ।
hk transliteration by Sanscript