From a glance, the calligraphy stands out well, and the background helps to support it and not take away from the text.
Considering you want a critique, I assume you would appreciate something a little more in depth. I've studied a bit of islamic calligraphy.
I think it would be nice for the font to be a little lighter in colour, and to be supported with a thin outline, preferrably a darker brown or black. When you stare at the picture, while trying to read the writing, the white becomes a bit painful, maybe sparing the texture a bit through would help or using a creamier colour. I'm not an expert, just trying to offer suggestions.
Overall I enjoy it, the pattern is fitting, the colours are warm and encouraging of the Prophet S.A.W. Good work Nayzak.