This is the second standza from Yoga Sutras Book I – Samadhi Pada.
It can be translated as
“Going beyond movement of mind is Yoga”
Patanjali was a sage in India who is believed to have authored a number of Sanskrit works, the most prominent of which is the Yoga Sutras, a classical yoga text dating to 200 BCE – 200 CE.
Patanjali is believed to have created the Yoga Sutras as a way of compiling already existing teachings into a format easier to follow and understand.
Today Patanjali is considered the father of yoga and his Yoga Sutras are one of most common texts that are studied on subject of yoga.