1 John 2:21
I am not writing to you because you do not know the truth, but because you do know it, and know that no lie is of the truth.
2 Peter 1:12
I shall therefore be always ready to remind you of all this, even though you know it, and are firmly founded in the truth which is with you.
Romans 15:14-15
And I myself also am confident regarding you, my brothers, that you yourselves are already full of goodness, filled with all knowledge, and well able to give advice to one another.
Jude 1:5
I wish to remind you of what you already know right well, that although the Lord once saved a people out of the land of Egypt, he afterward destroyed those who did not believe;