Swearing an oath while lying

He who swears an oath for something while he knows he is lying then there is no kaffaarah because what he has perpetuated is much worse than it be expiated for by means of kaffaarah. This is the view of the majority of the people of knowledge. These include:

Ibn Mas'uud
Sa'iid ibn al-Musayyib
Maalik
al-Hasan
al-'awzaa'ii
al-Thawri
al-laith
the ashaab al-hadiith

Reference(s)

al-Mughni