Luke 24:16
but, their eyes, were held, so as not to know him.
John 20:14
These things saying, she turned round, and seeth Jesus standing, and knew not that it was, Jesus.
John 21:4
But, morning by this time drawing on, Jesus stood upon the beach; nevertheless, the disciples knew not that it was, Jesus.
Luke 24:31
And, their, eyes were opened, and they knew him; and, he, vanished from them.
2 Kings 6:18-20
And, when they came down to him, Elisha prayed unto Yahweh, and said - Smite, I beseech thee, this people, with sudden blindness. And he smote them with sudden blindness, according to the word of Elisha.