Srimad-Bhagavatam: Canto 11 - Chapter 1 - Verse 22
Sanskrit:
सङ्ख्याने सप्तदशके भूतमात्रेन्द्रियाणि च ।पञ्च पञ्चैकमनसा आत्मा सप्तदश: स्मृत: ॥ २२ ॥
ITRANS:
saṅkhyāne saptadaśakebhūta-mātrendriyāṇi capañca pañcaika-manasāātmā saptadaśaḥ smṛtaḥ
Translation:
Some calculate the existence of seventeen basic elements, namely the five gross elements, the five objects of perception, the five sensory organs, the mind, and the soul as the seventeenth element.