Muhammed's name (محمد) with Salat phrase (صلى الله عليه وسلم) written in Thuluth, an Arabic Calligraphy.
<a href="//commons.wikimedia.org/wiki/User:Ahmad2099" title="User:Ahmad2099">Ahmad2099</a>
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>