https://en.m.wikipedia.org/wiki/Golem

A golem is inscribed with Hebrew words in some tales (for example, some versions of Chełm and Prague, as well as in Polish tales and versions of Brothers Grimm), such as the word emet (אמת, "truth" in Hebrew) written on its forehead. The golem could then be deactivated by removing the aleph (א) in emet,[7] thus changing the inscription from "truth" to "death" (met מת, meaning "dead").