Bhagavad Gita: Chapter 2, Verse 70

आपूर्यमाणमचलप्रतिष्ठं समुद्रमापः प्रविशन्ति यद्वत् ।
तद्वत्कामा यं प्रविशन्ति सर्वे स शान्तिमाप्‍नोति न कामकामी ॥ ॥ २-७० ॥

āpūryamāṇam acala-pratiṣṭhaṁ
samudram āpaḥ praviśanti yadvat
tadvat kāmā yaṁ praviśanti sarve
sa śāntim āpnoti na kāma-kāmī 2.70

A person who is not disturbed by the incessant flow of desires – that enter like rivers into the ocean, which is ever being filled but is always still – can alone achieve peace and not the one who strives to satisfy such desires.