Shalom aleichem

Shalom aleikhem (/ʃaˈlɔm aˈlexɛm/; Hebrew: שָׁלוֹם עֲלֵיכֶם‎ shālôm ʻalêḵem) is a spoken greeting in Hebrew, meaning "." The appropriate response is aleikhem shalom ("unto you peace").

This form of greeting is traditional among Jews throughout the world. It occurs six times in the Jerusalem Talmud. The greeting is more common amongst Ashkenazi Jews. Only the plural form "עֲלֵיכֶם‎" is used even when addressing one person. A religious explanation for this is that one greets both the body and the soul, but Hebrew does occasionally use the plural as a sign of respect (e.g. a name of God is Elohim אלוהים‎, literally gods).

Many religions share cognates to this greeting.

The related Muslim variation as-salāmuʿalaikum, ("peace be upon you") is used by Muslims of many language and ethnic backgrounds. The appropriate response is Wa alaikum salaam ("unto you peace"). (In Arabic السلام عليكم) As-salāmu alaykum and its variants are used by Muslims outside of the Arab world in Turkey, Indonesia, Central Asia, Iran, Sahel Africa, East Africa, and many other places. Aramaic and classical Syriac use Shlomo 'ahlaykhu which means peace for you.

...
Wikipedia