Yōga Sūtra 3.45

स्थूलस्वरूपसूक्ष्मान्वयार्थवत्त्वसंयमाद्भूतजयः।

sthūlasvarūpasūkṣmānvayārthavattvasaṁyamādbhūtajayaḥ।

[स्थूल स्वरूप सूक्ष्म अन्वय अर्थवत्त्व संयमात् भूत जयः।
sthūla = gross; svarūpa = forms; sūkṣma = subtle; anvaya = constitution; arthavattva = the understanding behind; saṁyamāt = by integration of; bhūta = elements; jayaḥ = victory over;]

By samyama on the understanding behind gross form and subtle constitution, one gains victory over elements.