Genesis 42:8
And Joseph knew his brethren but they did not know him.
Genesis 37:2
These are the generations of Jacob. Joseph, being seventeen years old, was feeding the flock with his brethren; and the lad was with the sons of Bilhah and with the sons of Zilpah, his father's wives; and Joseph brought unto his father their evil report.
Luke 24:16
But their eyes were held fast that they should not know him.
John 20:14
And when she had said this, she turned around and saw Jesus standing there and did not know that it was Jesus.
John 21:4
But when the morning was now come, Jesus stood on the shore, but the disciples did not understand that it was Jesus.