Release fish into the sea
It means to let go the enemy and leave behind the evil. It can be used as predicate, attribute and object.
Idiom and allusion [source] Chapter 4 and Chapter 2 of the romance of the Three Kingdoms: "today Liu Bei's fish in the pot and tiger in the well, if he doesn't catch them at this time, it's like releasing fish into the sea and letting the tiger go back to the mountain."
Release fish into the sea
cicadas chill and drearily shrill - hán chán qī qiè
be mentally and physically exhausted - shēn xīn jiāo cuì