The gospel is taken from the Book of the Pistis Sophia:
the mother of Jesus according to matter, said:
When Thou my Master wert a child,
before the Spirit had descended upon Thee,
when Thou wert in the vineyard with Joseph,
the Spirit came down from the height,
and came unto me in the house,
like unto Thee,
and I knew him not,
but thought that he was Thou.
And he said unto me, ‘Where is Jesus, my brother, that I may go to meet him?’
And when he had said this unto me I was in doubt,
and thought it was a phantom tempting me.
I seized him and bound him to the foot of the bed which was in my house,
until I had gone to find you in the field--
Thee and Joseph.
It came to pass, therefore,
when Thou didst hear me saying this thing unto Joseph,
that Thou didst understand,
and Thou wert joyful and saidest,
‘Where is he, that I may see him? Nay I am expecting him in this place.’
And it came to pass,
when Joseph heard Thee say these words,
that he was disturbed.
We went together,
we entered into the house,
we found the spirit bound on the bed,
and we gazed upon Thee and him,
and found that Thou wert like unto him.
And he that was bound to the bed was unloosed;
he embraced Thee and kissed thee,
and Thou didst kiss him;
and ye became one and the same being.