Where does “سلام علیکم” come from?

سلام علیکم (Ottoman Turkish) comes from Arabic اَلسَّلَام عَلَيْكُم — peace be upon you.

Ancestry of “سلام علیکم”, step by step

Step	Language	Word	Meaning
1	Arabic	اَلسَّلَام عَلَيْكُم	peace be upon you

سلام علیکم — Etymology, Origin & Word History | Etymology Explorer