Bhagavad Gita 6.25

शनैः शनैरुपरमेद् बुद्ध्या धृतिगृहीतया। आत्मसंस्थं मनः कृत्वा न किञ्चिदपि चिन्तयेत्

śhanaiḥ śhanair uparamed buddhyā dhṛiti-gṛihītayā ātma-sansthaṁ manaḥ kṛitvā na kiñchid api chintayet

Little by little, let him attain steadiness of the intellect by holding it firmly; having made the mind establish itself in the Self, let him not think of anything else.

धैर्ययुक्त बुद्धिके द्वारा संसारसे धीरे-धीरे उपराम हो जाय और परमात्मस्वरूपमें मन-(बुद्धि-) को सम्यक् प्रकारसे स्थापन करके फिर कुछ भी चिन्तन न करे।