Charak Samhita
आदिर्नास्त्यात्मनः [१] क्षेत्रपारम्पर्यमनादिकम्। अतस्तयोरनादित्वात् किं पूर्वमिति नोच्यते ॥८२॥
Aatma (soul) does not have a beginning, and similarly, the corpus (combination of ayu elements) also does not have a beginning. The continuity of kshetra and kshetragya is so long that it is not possible to say which came earlier (kshetra or kshetragya)
english translation
AdirnAstyAtmanaH [1] kSetrapAramparyamanAdikam। atastayoranAditvAt kiM pUrvamiti nocyate ॥82॥
hk transliteration by Sanscript