Kotowaza of the day: No one can talk to a horse of course

Japanese:

馬の耳に念仏

Romanized:

Uma no mimi ni nenbutsu

Meaning of Japanese:

Chanting Buddhist invocations into a horse's ear

English equivalents:

Like talking to a brick wall
Like preaching to a deaf ear

Related:

In one ear and out the other

This kotowaza is often lumped together with its cousin, Neko ni koban