It was at the manger of the Lord that this revelation was made to the same lady in Bethlehem: how the shepherds came to the manger to adore the newborn Christ.
Chapter 23

I saw also in the same place, while the Virgin Mary and Joseph were adoring the boy in the manger, that shepherds and guardians of the flock then came to see and adore the infant. When they had seen it, they first wished to inquire whether it were male or female because the angels announced to them that the Savior of the world had been born and had not said "savioress." Therefore the Virgin Mother then showed to them the infant's natural parts and male sex; and at once they adored him with great reverence and joy; and afterward they returned praising and glorifying God for all these things that they had heard and seen.