John 10:5

ἀκολουθήσουσιν for -σωσιν (correction to more usual construction, comp. John 4:14; Luke 10:19).

5. ἀλλοτρίῳ δὲ οὐ μή. But a stranger they will in no wise follow: strong negative, as in John 4:14; John 4:48; John 6:35; John 6:37; John 8:12; John 8:51-52. The ἀλλότριος is anyone whom they do not know, not necessarily a thief or robber: they meet him outside the fold. There is a story of a Scotch traveller who changed clothes with a Jerusalem shepherd and tried to lead the sheep; but the sheep followed the shepherd’s voice and not his clothes.