How does Dantes pray to God when he sees the chest with jewels? (chapter 14) (15)

From the text:

He would fain have gazed upon his gold, and yet he had not strength enough; for an instant he leaned his head in his hands as if to prevent his senses from leaving him, and then rushed madly about the rocks of Monte Cristo, terrifying the wild goats and scaring the sea-fowls with his wild cries and gestures; then he returned, and, still unable to believe the evidence of his senses, rushed into the grotto, and found himself before this mine of gold and jewels.

This time he fell on his knees, and, clasping his hands convulsively, uttered a prayer intelligible to God alone. He soon became calmer and more happy, for only now did he begin to realize his felicity.