Sarah Bas Tovim (lived in the late 17th and early 18th centuries) was a Ukrainian Jewish woman, author of Shloshe Shearim ("Three Portals") the most widely circulated of the tkhines, Yiddish-language prayer booklets intended mainly for Jewish women. Dovid Katz refers to Sarah as Sora bas Toyvim and refers to another of her works that have survived, Sheker ha-kheyn. Born in the small town of Satanov in the Podolia region of Ukraine, she claimed descent from Rabbi . Because Bas Tovim was so well known, many Maskilim during the 19th century attached her name to tkhines they created.