Yōga Sūtra 2.03

अविद्यास्मितारागद्वेषाभिनिवेशाः पञ्च क्लेशाः।

The five obstacles in the path are: ignorance (avidya), ego (asmita), passion (raga), hatred (dveṣa), and hankering to live (abhiniveśa).

The five obstacles are listed. Their causes must be weakened with the help of practice.