śreyaḥ-sṛtiṁ bhaktim udasya te vibho
kliśyanti ye kevala-bodha-labdhaye
teṣām asau kleśala eva śiṣyate
nānyad yathā sthūla-tuṣāvaghātinām
śreyaḥ-sṛtim - the auspicious path of liberation; bhaktim - devotional service; udasya - giving up; te - of You; vibho - O my Lord; kliśyanti - accept increased difficulties; ye - all those persons who; kevala - only; bodha-labdhaye - for obtaining knowledge; teṣām - for them; asau - that; kleśalaḥ - trouble; eva - only; śiṣyate - remains; na - not; anyat - anything else; yathā - as much as; sthūla - bulky; tuṣa - husks of rice; avaghātinām - of those beating.
This is a quotation from Śrīmad-Bhāgavatam (10.14.4).