Mahabharata 3.229.20

गणैरप्सरसां चैव त्रिदशानां तथात्मजैःविहारशीलः क्रीडार्थं तेन तत्संवृतं सरः

gaṇairapsarasāṃ caiva tridaśānāṃ tathātmajaiḥvihāraśīlaḥ krīḍārthaṃ tena tatsaṃvṛtaṃ saraḥ

Our plain-language meaning of this verse is waiting for scholar review.