John 10:5

³  To him the porter openeth; and the sheep hear his voice: and he calleth his own sheep by name, and leadeth them out.

⁴  And when he putteth forth his own sheep, he goeth before them, and the sheep follow him: for they know his voice.

⁵  And a stranger will they not follow, but will flee from him: for they know not the voice of strangers.

⁶  This parable spake Jesus unto them: but they understood not what things they were which he spake unto them.

⁷  Then said Jesus unto them again, Verily, verily, I say unto you, I am the door of the sheep.