Yoga Sūtra Chapter Four verse 18
सदाज्ञाताः चित्तव्र्त्तयः तत्प्रभोः पुरुषस्यापरिणामित्वात् ॥१८॥
sadā jñātāḥ citta-vṛttayaḥ tat-prabhoḥ puruṣasya-apariṇāmitvāt ||18||
The fluctuations of the psyche always known
due to the non-transformation of the master,
that animating principle.