Skandapurana 5.36.49

5.36.49

cāturyuṃgyaṃ hi tatpīṭhaṃ sthitānāṃ siddhimāha ret ..
yugānurūpataḥ sadyastato vakṣyāmyahaṃ dvija .. 49 ..

For that seat bestows accomplishment across the four ages / immediately upon those residing there, according to the age; therefore I shall explain, O brahmin. (49)