Luke 24:16

but their eyes were affected so as not to discern who he was.

John 20:14

having thus said, she turned about, and saw Jesus standing, but knew not that it was Jesus.

John 21:4

as soon as it was morning, Jesus stood on the shore: but the disciples did not know that it was Jesus.

Treasury of Scripture Knowledge

Summary

And Joseph knew his brethren, but they knew not him.

Bible References

But they knew

Luke 24:16
but their eyes were affected so as not to discern who he was.
John 20:14
having thus said, she turned about, and saw Jesus standing, but knew not that it was Jesus.
John 21:4
as soon as it was morning, Jesus stood on the shore: but the disciples did not know that it was Jesus.