Skandapurana 5.114.15

5.114.15

māṃḍavyānāṃ triviṃśacca bahvṛcānāṃ triviṃśatiḥ ..
sāṃkṛtyānāṃ viśiṣṭānāṃ pṛthaktvena daśaiva tu .. 15 ..

twenty-three of the Māṇḍavyas, and twenty-three Bahvṛcas; / of the distinguished Sāṅkṛtyas, exactly ten distinct [families]; // 15