English translation:When the chess game is over, the pawns, rooks, knights, bishops, kings, and queens all go back into the same box.
Quando il gatto non c'è il topo balla.
English translation:When the cat's away, the mice will play.
Quando la pera è matura, casca da sè.
English translation:All things happen in their own good time.
Quando si è in ballo, bisogna ballare.
English translation:In for a penny, in for a pound.
From:https://www.dbfei.com/Article/yidaliyu/201311/7294.html