योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-167, verse-6

नानामहाशब्दमपि शिलामौनमवस्थितम् ।
अनारतं गच्छदपि व्योमवच्छैलवत्स्थितम् ॥ ६ ॥

nānāmahāśabdamapi śilāmaunamavasthitam ,
anārataṃ gacchadapi vyomavacchailavatsthitam 6

6. All things however sounding, are as silent as the still stone said before; and though they seem to be ever moving, they are ever as quiet as the void of the sky, and as still as the quiescent stone.