Actually, he did.

"And having come to a certain cave, and wishing to rest in it, the blessed Mary dismounted from her beast, and sat down with the child Jesus in her bosom. And there were with Joseph three boys, and with Mary a girl, going on the journey along with them. And, lo, suddenly there came forth from the cave many dragons; and when the children saw them, they cried out in great terror. Then Jesus went down from the bosom of His mother, and stood on His feet before the dragons; and they adored Jesus, and thereafter retired. Then was fulfilled that which was said by David the prophet, saying: Praise the Lord from the earth, ye dragons; ye dragons, and all ye deeps."