Where does “sabbatum” come from?

sabbatum (Ecclesiastical Latin) comes from Ancient Greek σάββατον, from Aramaic שַׁבְּתָא, from Hebrew שַׁבָּת, from Akkadian šapattum.

Ancestry of “sabbatum”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	σάββατον	Sabbath
2	Aramaic	שַׁבְּתָא	sabbath
3	Hebrew	שַׁבָּת	Sabbath, Shabbat; weekly day of rest; sabbath
4	Akkadian	šapattum	—

sabbatum — Etymology, Origin & Word History | Etymology Explorer