Srimad Bhagavatam Canto 04, Chapter 19, Text 07

SB 4.19.7

yatra dharma-dugha bhumih
sarva-kama-dugha sati
dogdhi smabhipsitan arthan
yajamanasya bharata
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
My dear Vidura, in that great sacrifice the entire land came to be like the milk-producing kama-dhenu, and thus, by the performance of yajña, all daily necessities for life were supplied.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
In this verse the word dharma-dugha is significant, for it indicates kama-dhenu. Kama-dhenu is also known as surabhi. Surabhi cows inhabit the spiritual world, and, as stated in Brahma-samhita, Lord Krsna is engaged in tending these cows: surabhir abhipalayantam. One can milk a surabhi cow as often as one likes, and the cow will deliver as much milk as one requires. Milk, of course, is necessary for the production of so many milk products, especially clarified butter, which is required for the performance of great sacrifices. Unless we are prepared to perform the prescribed sacrifices, our supply of the necessities of life will be checked. Bhagavad-gita confirms that Lord Brahma created human society along with yajña, the performance of sacrifice. Yajña means Lord Visnu, the Supreme Personality of Godhead, and sacrifice means working for the satisfaction of the Supreme Personality of Godhead. In this age, however, it is very difficult to find qualified brahmanas who can perform sacrifices as prescribed in the Vedas. Therefore it is recommended in Srimad-Bhagavatam (yajñaih sankirtana-prayaih) that by performing sankirtana-yajña and by satisfying the yajña-purusa, Lord Caitanya, one can derive all the results derived by great sacrifices in the past. King Prthu and others derived all the necessities of life from the earthly planet by performing great sacrifices. Now this sankirtana movement has already been started by the International Society for Krishna Consciousness. People should take advantage of this great sacrifice and join in the Society’s activities; then there will be no scarcity. If sankirtana-yajña is performed, there will be no difficulty, not even in industrial enterprises. Therefore this system should be introduced in all spheres of life — social, political, industrial, commercial, etc. Then everything will run very peacefully and smoothly.
Srimad Bhagavatam Canto 04, Chapter 19, Text 06
Srimad Bhagavatam Canto 04, Chapter 19, Text 08