15“Watch out for false prophets. They come to you in sheep’s clothing, but inwardly they are ferocious wolves. 16By their fruit you will recognize them. Do people pick grapes from thornbushes, or figs from thistles? 17Likewise every good tree bears good fruit, but a bad tree bears bad fruit. 18A good tree cannot bear bad fruit, and a bad tree cannot bear good fruit. 19Every tree that does not bear good fruit is cut down and thrown into the fire. 20Thus, by their fruit you will recognize them.
(Job 11:12). So Ishmael is called a “wild ass-man”; Hebrew (Ge 16:12). These Bedouin robbers, with the unbridled wildness of the ass of the desert, go forth thither. Robbery is their lawless “work.” The desert, which yields no food to other men, yields food for the robber and his children by the plunder of caravans.
rising betimes-In the East travelling is begun very early, before the heat comes on.
praying - to the East, before knowledge comes on.