Revākhaṇḍa of the Skandapurāṇa manuscripts (RKS) 88.7

88.7

manvantarādayaś caiva hyanantaphaladāḥ smṛtāḥ /
ayane tūttare caiva dakṣiṇe ca tathaiva hi //

The beginnings of the Manvantaras are declared to bestow endless fruit;
and likewise at the northern solstice and at the southern solstice;