Yochanan (Jhn) 10:3-5

This is the one the gate-keeper admits, and the sheep hear his voice. He calls his own sheep, each one by name, and leads them out. After taking out all that are his own, he goes on ahead of them; and the sheep follow him because they recognize his voice. They never follow a stranger but will run away from him, because strangers’ voices are unfamiliar to them.”