John 10:3-5

The watchman opens the door for this man, and the sheep listen to his voice and heed it; and he calls his own sheep by name and brings (leads) them out. When he has brought his own sheep outside, he walks on before them, and the sheep follow him because they know his voice. They will never [on any account] follow a stranger, but will run away from him because they do not know the voice of strangers or recognize their call.