قلبها تنها با یاد خدا ارام میگیرد.

On the house:

If you have something on the house, it is given to you free by a business

Have you heard that the drinks on Arno's are on the house?

By mistake:

Accidentally

I've written the same thing twice by mistake.

Invite over:

To invite someone to come to your house

Let's invite my parents over tonight.