Where does “assalam alaikum” come from?

assalam alaikum (Classical Malay) comes from Arabic اَلسَّلَام عَلَيْكُم — peace be upon you.

Ancestry of “assalam alaikum”, step by step

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

assalam alaikum — Etymology, Origin & Word History | Etymology Explorer