Salaam to all.
This one particular character of the 99 is one of the most utter word by me, maybe because the word is easy to utter it. There is supplication that I memorized from one of the book I have, in which it says:
Allahumma antas Salaam, wa minkas salaam, wa alaika ya'uudus salaam, fakhayyina robbana bis salaam, wad khilnal jannata daarus salaam. Tabaarokta robbana wa ta a laita yaa dhal jalaali wal ikrom.
I think the above supplication is the expanded version, most others that I see in the internet seem shorter. I have been using this wonderful sentences ever since I know it. I read it even in the heart anywhere, whenever wherever. But it is the first bold sentence that I use most. If you are not a muslim it is still the same, it just means:
O Lord, you are the Peace.