Here is the Sanskrit anuvad, Hindi anuvad, and English translation of Raja-Vidya-Raja-Guhya Yoga Chapter 9, Verse 9.2.
Sanskrit
राजविद्या राजगुह्यं पवित्रमिदमुत्तमम् । प्रत्यक्षावगमं धर्म्यं सुसुखं कर्तुमव्ययम् ॥ ९.२ ॥
Hindi
यह विज्ञानसहित ज्ञान सब विद्याओंका राजा, सब गोपनीयोंका राजा, अति पवित्र, अति उत्तम, प्रत्यक्ष फलवाला, धर्मयुक्त, साधन करनेमें बड़ा सुगम और अविनाशी है|
English
This Gyan is the most significant secret knowledge in the universe, O Arjuna. It is very pure and helpful to all beings. It produces direct and favourable results. This virtuous secret is easy to practice and is imperishable.