to know that # 14_2CH_13_05 # Ought ye not to know that the LORD God of Israel gave the kingdom over Israel to David for ever, [even] to him and to his sons by a covenant of salt? 
to know that # 66_REV_03_09 # Behold, I will make them of the synagogue of Satan, which say they are Jews, and are not, but do lie; behold, I will make them to come and worship before thy feet, and to know that I have loved thee.