Shah maat, actually, and it came from Farsi/Persian, not Arabic. Shah is Farsi for king.

Edit: The word chess itself also derives from shah. According to Wiktionary [0], it comes from Old French eschés, the plural of eschec, which comes from Vulgar Latin (scaccus* being the unattested reconstruction), which comes from Arabic shah, which finally comes from Farsi shah.

[0] https://en.wiktionary.org/wiki/chess