“I swear that I will not eat this loaf”; “I swear that I will not eat it”; “I swear that I will not eat it,” and he ate it —- he is liable only once. This is the oath of utterance for which one is liable for its willful transgression to [a penalty of] lashes, and for its inadvertent transgression to a variable [sin-] offering. [For] a vain oath —- one is liable for its willful transgression to [a penalty of] lashes, and for its inadvertent transgression, one is exempt.