Chapter 3 contains 56 sutras which talk about the advantages of consistent yoga practice. Here, Patanjali dwells deeply into the last two limbs of yoga, Dhyana and Samadhi, and examines the power and manifestation that arise from practicing yoga.
We have covered the first five limbs of yoga in Chapter 2 of Patanjali Sutras. The remaining three are meditation (dhyana), concentration (dharana), and absorption (samadhi).