Bhagavad Gita Chapter 6 Verse 25

Gita 6.25

शनैः, शनैः, उपरमेत्, बुद्धया, धृतिगृृहीतया,
आत्मसंस्थम्, मनः, कृत्वा, न, किंचित्, अपि, चिन्तयेत्।।25।।

Gita 6.25

ShanaeH, shanaeH, uparmet’, buddhya, dhrtigrheetya,
Aatmsanstham’, manH, krtva, na, kinchit’, api, chintayet’ ||25||

Translation: (ShanaeH, shanaeH) gradually practicing (uparmet’) by the above-mentioned opinion i.e. knowledgeable thought (dhrtigrheetya) patient (buddhya) with intellect (manH) mind (aatmsanstham’) fixing i.e. establishing in the Supreme God (krtva) by doing (kinchit’) anything (api) also (na, chintyet’) should not worry. (25)

Gita 6.25: By gradually practicing and fixing i.e. establishing the mind in the Supreme God with patient intellect through the above-mentioned opinion i.e. knowledgeable thought one should not worry about anything.