Jesus said:

‘I am the good shepherd:
the good shepherd is one who lays down his life for his sheep.
The hired man, since he is not the shepherd
and the sheep do not belong to him,
abandons the sheep and runs away
as soon as he sees a wolf coming,
and then the wolf attacks and scatters the sheep;
this is because he is only a hired man
and has no concern for the sheep.
‘I am the good shepherd;
I know my own and my own know me,
just as the Father knows me and I know the Father;
and I lay down my life for my sheep.
And there are other sheep I have that are not of this fold,
and these I have to lead as well.
They too will listen to my voice,
and there will be only one flock, and one shepherd.
‘The Father loves me,
because I lay down my life in order to take it up again.
No one takes it from me;
I lay it down of my own free will,
and as it is in my power to lay it down,
so it is in my power to take it up again;
and this is the command I have been given by my Father.’