Replace header-text with image

Hello,

thanks for that theme. Just a question. I want to replace the header-text with an image 1095×195 px.

Can anyone assist in doing this.

I thought, commenting out
<h1 class="site-title"><a href="<?php echo esc_url( home_url( '/' ) ); ?>" rel="home"><?php bloginfo( 'name' ); ?></a></h1>

within the
<div class="header-text">
and inserting
<img source="/images/banner.jpg"> in the header.php would do it. But this doesn’t work