A devotee of Lord Krsna, he does not eat anything which is not offered to Krsna. Just like you take the remnants of your master. Just the servant takes the remnants after the master eats. In India the process is that husband and wife, that after the husband eats, the remnants are taken by the wife. The wife does not eat along with the husband. That is the old system. Now it is being changed. The husband and wife, they do not… The husband is supplied by the wife all kinds of good dishes, and when the husband is satisfied, some foodstuff is left, and that is taken by the wife. So similarly, a devotee of Krsna, he does not take anything, does not accept anything which is not offered to Krsna. This is the process. Because his life is full of Krsna consciousness.

From Srila Prabhupada’s lecture on Bhagavad-gita 4.19–22 – August 5, 1966, New York