Strong H7621 שְׁבוּעָה shebû‛âh · oath

Leviticus

1. Leviticus 5:4
   Or if a soul swear, pronouncing with his lips to do evil, or to do good, whatsoever it be that a man shall pronounce with an oath, and it be hid from him; when he knoweth of it, then he shall be guilty in one of these.