योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-83, verse-31

कुर्वन्निजं प्रकृतमेव यथाप्रवाहमाचारजालमचलः परमार्थमौनात् ।
निर्मानमोहमदभेदमनङ्गजीवमाकाशकोशविशदाशयशान्तमास्व ॥ ३१ ॥

kurvannijaṃ prakṛtameva yathāpravāhamācārajālamacalaḥ paramārthamaunāt ,
nirmānamohamadabhedamanaṅgajīvamākāśakośaviśadāśayaśāntamāsva 31

31. Now Rama, remain to discharge your ordinary duties, as they are incumbent on you by the rules of your race; but continue to be quiet and steady in your spiritual part, by renouncing all worldly pride and vanity; and enjoy a peaceful composure in your mind and soul, as that of the serene and calm and clear concavity of the sky.