When food is offered to Lord Krishna with love and devotion and He is pleased and accepts it from the devotee, Rukminīdevī, the goddess of fortune, becomes so greatly obliged to the devotee that she has to go personally to the devotee’s home to turn it into the most opulent home in the world. If one feeds Nārāyana sumptuously, the goddess of fortune, Lakshmī, automatically becomes a guest in one’s house, which means that one’s home becomes opulent. 

~ Krishna book, Chapter 81