yei sūtre yei ṛk — viṣaya-vacana
bhāgavate sei ṛk śloke nibandhana
yei sūtre - in the aphorisms of the Vedānta-sūtra; yei - whatever; ṛk - Vedic mantras; viṣaya-vacana - subject matter to be explained; bhāgavate - in Śrīmad-Bhāgavatam; sei ṛk - those same Vedic mantras; śloke - in eighteen thousand verses; nibandhana - compiling.