Where does “السَّبْت” come from?

السَّبْت (Arabic) comes from Hebrew שבת, from Akkadian šapattum.

Ancestry of “السَّبْت”, step by step

Step	Language	Word	Meaning
1	Hebrew	שבת	Shabbat, Sabbath; weekly day of rest; Saturday;...
2	Akkadian	šapattum	—

السَّبْت — Etymology, Origin & Word History | Etymology Explorer