I have heard some Doha of Kabir (couplet) or somewhere else like this:
Ramchandra keh gaye siya se aisa kaliyug ayega,
Hans chugega dana dunaka, kauvva moti khayega
Means
Ramchandra told Sita such kaliyug will come that a goose will eat little grains and crow will eat pearls.
Here crows means bad people and goose means good people (will have less benefits).
So what did Lord Rama tell Sita about kaliyug? Please explain.