Genesis 42:8
And Joseph knew his brethren, but they knew not 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 to his father their evil report.
Luke 24:16
But their eyes were held, that they should not know him.
John 20:14
And when she had thus said, she turned herself about, and saw Jesus standing, and knew not that it was Jesus.
John 21:4
But when the morning had now come, Jesus stood on the shore: but the disciples knew not that it was Jesus.