Yōga Sūtra 3.11

सर्वार्थतैकाग्रतयोः क्षयोदयौ चित्तस्य समाधिपरिणामः।

sarvārthataikāgratayōḥ kṣayōdayau cittasya samādhipariṇāmaḥ।

[सर्वार्थः एकाग्रतयोः क्षय उदयौ चित्तस्य समाधि परिणामः।
sarvārthaḥ = at all times; ēkāgratayōḥ = having single pointed attention; kṣaya = reduction of; udayau = arousal; cittasya = of consciousness; samādhi pariṇāmaḥ = effect of Samādhi;]

(Practice of) having single pointed attention at all times results in the reduction of arousal of consciousness, called - samādhi-pariṇāmaḥ (Effects-of-Samādhi).