The wise have said that man liveth in vain in whose dwelling a Brahmana conversant with mantras doth not accept water, honey and curds, and kine from fear of being unable to appropriate them, or from miserliness and unwillingness with which the gifts are made.

In plain words: The wise say a man lives in vain if a learned Brahmana (priest) will not accept his gifts of water, honey, curds or cows. This happens when the gifts are offered stingily or unwillingly.