Shiva Purana
मनुः प्रजापतिस्त्वासीत्सावर्णिस्स तपोधनः ॥ भाव्यः स कर्मणा तेन मनोस्सावर्णिकेंतरे ॥ ३९ ॥
Sāvarṇi Manu became the patriarch. In the Sāvarṇika Manvantara he will become the future Manu by virtue of his action.
english translation
manuH prajApatistvAsItsAvarNissa tapodhanaH ॥ bhAvyaH sa karmaNA tena manossAvarNikeMtare ॥ 39 ॥
hk transliteration by Sanscript