Anandakanda 1.1.10

1.1.10

tadā himālayagireḥ guhāyāṃ suciraṃ priye /
saṃkrīḍamānayoḥ kālo gato naḥ putralipsayā //

then in a cave of the Himālaya mountain for a long time, O beloved, / our time passed sporting intimately together out of a desire for a son.