Shevuos4: 2
וְחַיָּבִין עַל זְדוֹן הַשְּׁבוּעָה, וְעַל שִׁגְגָתָהּ עִם זְדוֹן הָעֵדוּת, וְאֵינָן חַיָּבִין עַל שִׁגְגָתָהּ. וּמָה הֵן חַיָּבִין עַל זְדוֹן הַשְּׁבוּעָה? קָרְבָּן עוֹלֶה וְיוֹרֵד.
2. They are liable for the willful transgression of the oath, as well as for its inadvertent transgression coupled with the willful transgression of the testimony, but they are not liable for its inadvertent transgression. Now what are they liable for the willful transgression of the oath? A variable [sin-] offering.