How do I add custom font to the body content of a Blog post?

I'm trying to figure out how to add a custom font that will work in my Blog post's body content within a Text Block. 

I can only find advice on how to us custom font for a Blog post's title.

I already have a custom font installed on my site's Custom CSS, set to H3, that works everywhere on my site except for the Blog.

I'm using the Five template if that matters.

Any help would be very appreciated, thanks in advance!

Add to Home > Design > Custom CSS

.body.entry-content * {
    font-family: monospace;
}

replace monospace with your font