CC Madhya 22.40
naivārtha-do yat punar arthitā yataḥ
svayaṁ vidhatte bhajatām anicchatām
satyam — it is true; diśati — He awards; arthitam — that which is desired; arthitaḥ — being requested; nṛṇām — by human beings; na — not; eva — certainly; artha-daḥ — giving desired things; yat — which; punaḥ — again; arthitā — request; yataḥ — from which; svayam — Himself; vidhatte — He gives; bhajatām — of those engaged in devotional service; anicchatām — even though not desiring; icchā-pidhānam — covering all other desires; nija-pāda-pallavam — the shelter of His own lotus feet.
“ ‘Whenever Kṛṣṇa is requested to fulfill one’s desire, He undoubtedly does so, but He does not award anything which, after being enjoyed, will cause one to petition Him again and again to fulfill further desires. When one has other desires but engages in the Lord’s service, Kṛṣṇa forcibly gives one shelter at His lotus feet, where one will forget all other desires.’
This is a quotation from Śrīmad-Bhāgavatam (5.19.27).