About releasing animals?

There is a saying: the son will not die, but his wealth will not leave. Because he came at a bad time, he bought a fish and set it free. When he released the fish, he said to the fish, "Thank you for your congeniality, but we are separated by Yin and Yang. I hope you will be such a fish, get lucky and live freely in the three realms, thank you, thank you ... "