This is the Parable of the Good Shepherd as identified by Sofia Cavalletti and Gianna Gobbi and given to the Level 1 child in Catechesis of the Good Shepherd:

“The sheep hear his voice, and he calls his own sheep by name and leads them out.  When he has brought out all his own, he goes before them, and the sheep follow him, for they know his voice.  A stranger they will not follow, but they will flee from him, for they do not know the voice of strangers….I came that they may have life, and have it abundantly.  I am the good shepherd.  The good shepherd lays down his life for the sheep….I am the good shepherd; I know my own and my own know me, as the Father knows me and I know the Father; and I lay down my life for the sheep.  And I have other sheep, that are not of this fold; I must bring them also, and they will heed my voice.  So there shall be one flock, one shepherd.”  (John 10:3b-5, 10b-11, 14-16)