SB 4.9.36

maitreya uvāca
na vai mukundasya padāravindayo
 rajo-juṣas tāta bhavādṛśā janāḥ
vāñchanti tad-dāsyam ṛte ’rtham ātmano
 yadṛcchayā labdha-manaḥ-samṛddhayaḥ
Synonyms: 
maitreyaḥ uvāca — the great sage Maitreya continued; na — never; vai — certainly; mukundasya — of the Lord, who can give liberation; pada-aravindayoḥ — of the lotus feet; rajaḥ-juṣaḥ — persons who are eager to taste the dust; tāta — my dear Vidura; bhavādṛśāḥ — like yourself; janāḥ — persons; vāñchanti — desire; tat — His; dāsyam — servitorship; ṛte — without; artham — interest; ātmanaḥ — for themselves; yadṛcchayā — automatically; labdha — by what is achieved; manaḥ-samṛddhayaḥ — considering themselves very rich.
Translation: 
The great sage Maitreya continued: My dear Vidura, persons like you, who are pure devotees of the lotus feet of Mukunda [the Supreme Personality of Godhead, who can offer liberation] and who are always attached to the honey of His lotus feet, are always satisfied in serving at the lotus feet of the Lord. In any condition of life, such persons remain satisfied, and thus they never ask the Lord for material prosperity.
Purport: 

In the Bhagavad-gītā the Lord says that He is the supreme enjoyer, the supreme proprietor of everything and anything within this creation, and the supreme friend of everyone. When one knows these things perfectly, he is always satisfied. The pure devotee never hankers after any kind of material prosperity. The karmīs, jñānīs and yogīs, however, endeavor always for their own personal happiness. Karmīs work day and night to improve their economic condition, jñānīs undergo severe austerities in order to get liberation, and yogīs also undergo severe austerities by practicing the yoga system for attainment of wonderful mystic powers. A devotee, however, is not interested in such activities; he does not want mystic powers or liberation or material prosperity. He is satisfied in any condition of life, as long as he is constantly engaged in the service of the Lord. The Lord’s feet are compared to the lotus, wherein there is saffron dust. A devotee is always engaged in drinking the honey from the lotus feet of the Lord. Unless one is freed from all material desires, he cannot actually taste the honey from the Lord’s lotus feet. One has to discharge his devotional duties without being disturbed by the coming and going of material circumstances. This desirelessness for material prosperity is called niṣkāma. One should not mistakenly think that niṣkāma means giving up all desires. That is impossible. A living entity is eternally existent, and he cannot give up desires. A living entity must have desires; that is the symptom of life. When there is a recommendation to become desireless, it is to be understood that this means that we should not desire anything for our sense gratification. For a devotee this state of mind, niḥspṛha, is the right position. Actually every one of us already has an arrangement for our standard of material comforts. A devotee should always remain satisfied with the standard of comforts offered by the Lord, as stated in the Īśopaniṣad (tena tyaktena bhuñjīthāḥ). This saves time for executing Kṛṣṇa consciousness.