Verse
पुरुषः प्रकृतिस्थो हि भुङ्क्ते प्रकृतिजान्गुणान् ।कारणं गुणसङ्गोऽस्य सदसद्योनिजन्मसु ॥
Purusha involved in Prakriti enjoys the qualities born of Prakriti; attachment to the qualities is the cause of his birth in good and evil wombs.
Gītā 13·22