Peace Be Upon Him (or simply PBUPH) is a phrase commonly used by Muslims to show respect and honor when speaking of prophets, messengers, and other important people in Islam. In Arabic, it is written as "sallallahu alayhi wa sallam". This phrase means "may peace be upon him" and is used to honor and show respect for these important people. It is said by Muslims to remember the teachings of prophets like Moses and Muhammad, and to show respect for their teachings.