Yoga Sūtra Chapter Two verse 47

प्रयत्नशैथिल्यानन्तसमापत्तिभ्याम् ॥४७॥

prayatna-śaithilya-ananta-samāpattibhyām ||47||

Both relaxation of continued effort and unity in infinity.

prayatna - continued effortśaithilya - relaxationananta - endless, boundless, eternal, infinite; the first serpentsamāpatti - coming together, unity

Commentaries and Reflections

T Krishnamacharya:

The practice of Āsana without breathing and without remembering Ananta has no value.

TKV Desikachar:

The test for intelligent effort is the response of the breath.