Śrī Caitanya Caritamrta · Text Madhya 6.133
উপনিষদ্-শব্দে যেই মুখ্য অর্থ হয় ।
সেই অর্থ মুখ্য, — ব্যাসসূত্রে সব কয় ॥ ১৩৩ ॥
upaniṣad-śabde yei mukhya artha haya
sei artha mukhya, — vyāsa-sūtre saba kaya
Caitanya Mahāprabhu continued, “The Vedānta-sūtra is the summary of all the Upaniṣads; therefore whatever direct meaning is there in the Upaniṣads is also recorded in the Vedānta-sūtra, or Vyāsa-sūtra.
Read Śrīla Prabhupāda's purport on Vedabase.io