Matsyapurana 61.56

61.56

saptaiva lokānāpnoti saptārghān yaḥ prayacchati
yāvadāyuśca yaḥ kuryāt paraṃ brahmādhigacchati //

The devotee offering a libation of water once, according to the rites prescribed, gets beauty and health; the one offering it twice gets a place in Bhuvara region, the one performing it thrice goes to heaven. In the same way, one who performs it seven times goes and enjoys in all the seven realms, one after the other; and the one who offers it during the whole of his lifetime, becomes united with Brahmâ.—52-53.