John10:3-5 kjv
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.