Bhagavad Gita 18.75
व्यासप्रसादाच्छ्रुतवानेतद्गुह्यमहं परम्। योगं योगेश्वरात्कृष्णात्साक्षात्कथयतः स्वयम्।।18.75।।
vyāsaprasādācchrutavānetadguhyamahaṃ param| yogaṃ yogeśvarātkṛṣṇātsākṣātkathayataḥ svayam||18.75||
vyasaprasadacchrutavanetadguhyamaham param yogam yogeshvaratkrishnatsakshatkathayatah svayam18.75
Meaning
By the grace of Vyasa, I have heard this supreme and most secret yoga directly from Krishna, the Lord of Yoga, speaking it Himself.
व्यास जी की कृपा से मैंने इस परम् गुह्य योग को साक्षात् कहते हुए स्वयं योगेश्वर श्रीकृष्ण भगवान् से सुना।
This is verse 75 of 78 in Chapter 18 (Moksha Sannyasa Yoga) of the Bhagavad Gita.