Skandapurana 6.3.51.24

6.3.51.24

dātā sa gacchate tatra yatra bhogāḥ sanātanāḥ .
guhāmadhye praviṣṭastu loṭayeccaiva śaktitaḥ .. 51.24 ..

That donor goes to that place where eternal enjoyments are.
Having entered inside the cave, one should roll [on the ground] according to one's ability.