योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-167, verse-13

तदेतदविनाशात्म सर्वत्र परमात्मनि ।
सर्वदा विद्यते शान्ते पयसीव तरङ्गकाः ॥ १३ ॥

tadetadavināśātma sarvatra paramātmani ,
sarvadā vidyate śānte payasīva taraṅgakāḥ 13

13. Therefore the phenomenon always belongs, to the noumenon of the Supreme spirit; and the fluctuating phenomenals ever abide in it, as the undulating waves play in the calm waters of the sea.