Charak Samhita
खादीनि बुद्धिरव्यक्तमहङ्कारस्तथाऽष्टमः। भूतप्रकृतिरुद्दिष्टा विकाराश्चैव षोडश ॥६३॥
॥ Ashta bhuta prakriti (eight sources of creation) and Shodash vikara (sixteen elements)॥ The five subtle elements (viz. shabdatanmantra, sparshatanmantra, rupatanmantra, rasatanmatra and gandhatanmatra), buddhi (intellect), avyakta (prakriti or nature) and ahamkara (ego) are the eight sources of creation.
english translation
khAdIni buddhiravyaktamahaGkArastathA'STamaH। bhUtaprakRtiruddiSTA vikArAzcaiva SoDaza ॥63॥
hk transliteration by Sanscript