yáng máo chū zài yáng shēn shàng

ㄧㄤˊ ㄇㄠˊ ㄔㄨㄗㄞˋ ㄧㄤˊ ㄕㄣㄕㄤˋ

Idiom

1Nothing comes for free.

2lit. wool comes from the sheep's back (idiom); One gets the benefit, but the price has been paid.