vedānta-vākya-kusuma-grathanārthatvāt sūtrāṇām
vedānta-vākya-kusuma-grathanārthatvāt sūtrāṇām |
(Śārīraka-bhāṣya of Śaṅkarācārya on Vedānta-sūtra: 1.1.2)
“The purpose of the sūtras is tying together the flowers of the statements of the Vedānta [i.e., the Upaniṣads].”