Sankhya Kārika
Karika 46
एष प्रत्ययसर्गो विपर्ययाशक्तितुष्टिसिद्ध्याख्यः। गुणवैषम्यविमर्दात्तस्य च भेदास्तु पञ्चाशत् ॥४६॥
These various determinations like despair, weakness, complacency, perfection, and others are born from the mixture of qualities in various proportions. They are classified into fifty types.