A--- This implies concealing the truth and not to submit thereto while one knows it such as the disbelief of Pharaoh and his folk in Musa (Moses) (Peace be upon him) and the disbelief of the Jews in Muhammad (Peace be upon him).

Allah the Almighty says in regard to Pharaoh and his folk: {And they belied them (those Ayat) wrongfully and arrogantly, though their own selves were convinced thereof [i.e. those (Ayat) are from Allah, and Musa (Moses) is the Messenger of Allah in truth, but they disliked to obey Musa (Moses), and hated to believe in his Message of Monotheism]}. (An-Naml, 14)

He says in regard to the Jews: {Then when there came to them that which they had recognized, they disbelieved in it}. (Al-Baqarah, 89)

Allah the Almighty says: {But verily, a party of them conceal the truth while they know it -[i.e. the qualities of Muhammad (Peace be upon him) which are written in the Taurat (Torah) and the Injeel (Gospel)]}. (Al-Baqarah, 146)