Patanjali Yoga Sutra 3.11

Sanskrit Sutra

सर्वार्थतैकाग्रतयोः क्षयोदयौ चित्तस्य समाधि-परिणामः॥११॥

Swami Vivekananda's translation

Taking in all sorts of objects, and concentrating upon one object, these two powers being destroyed and manifested respectively, the Chitta gets the modification called Samadhi.

Chapter link: Yoga Sutra Chapter 3