to the top] From the people which were below, that he might be the more retired for prayer. So Christ, Matthew 17:1.
cast himself down] In a most humble manner, before God, upon his knees.
put his face, &c.] Bowed his head to the very earth whereon he kneeled, testifying thereby the fervency of his devotion. Though he discerned rain to be coming, yet he is earnest in using means, James 5:18.