Here is the Sanskrit anuvad, Hindi anuvad, and English translation of Atma-Samyama Yoga Chapter 5, Verse 5.20.
Sanskrit
न प्रहृष्येत्प्रियं प्राप्य नोद्विजेत्प्राप्य चाप्रियम् । स्थिरबुद्धिरसंमूढो ब्रह्मविद्ब्रह्मणि स्थ…
Hindi
जो पुरुष प्रियको प्राप्त होकर हर्षित नहीं हो और अप्रियको प्राप्त होकर उद्विग्न न हो, वह स्थिरबुद्धि, संशयरहित, ब्रह्मवेत्ता पुरुष सच्चिदानन्दघन परब्रह्म परमात्मामें एकीभावसे नित्य स्थित है|
English
One truly becomes established in God when neither good circumstances make him happy, no bad Circumstance make him miserable. When a person reaches this type of balance in intellect and emotion, without a single doubt, with true knowledge of God, becomes eternally fixed in Him.