Matsyapurana 9.37

9.37

atītānāgatāścaite manavaḥ parikīrtitāḥ
ṣaḍūnaṃ yugasāhasram ebhir vyāptaṃ narādhipa //

From Prajâpati Ruchi there shall be Rauchya Manu, from Prajâpati Bhûtya there shall be Bhautya Manu and from Brahmâ there shall be Merusâvarṇya, Ṛita, Ṛitadhâmâ, Visvakeṣṇa Manus. "I have explained to you something about the past and future Manus, O, King! Similarly, commencing from the age of Devâs, in the 994th age, the afore-mentioned fourteen Manus rule in succession. In their time, they play their part in the creation of the moveable and immoveable objects, and afterwards attain final rest with Brahmâ, at the end of the age. They (the Manus), after 1,000 ages, shall be absorbed in Brahmâ and be joined to Viṣṇu".—34.