Behemoth can refer to cattle. In 40:15 it is probably a hippopotamus.
God’s great majesty shines forth in poetic language in chs. 38–39. These are some of the Bible’s most awe-inspiring passages about God.
The snow from Mount Hermon is an important water source for the Jordan River, but the climate in much of Israel is too mild for regular snowfall. In Job, snow is a symbol of purity (37:6).
Songs in the night. Without the conveniences of modern streetlights or flashlights, nights in the ancient world were very dark and often frightening. People could easily hurt themselves at night or fall prey to animals or criminals. Songs of worship were a great comfort in those circumstances (35:10).
Pits were used for everything from water collection and food storage to animal traps and prisons. Pits were often seen as signs of danger, representing the final destination of the wicked (33:18). Often the wicked are described as falling into the very pits that they themselves dug (Ps. 7:15; Prov. 26:27).
Elihu is the only character in the book of Job with a Hebrew name.
Rocks pouring out streams of oil (29:6) is a reference to olive trees. They are one of the few trees that thrive in rocky soil. It can be 10 years or more before an olive tree yields fruit, but then it can produce olives for hundreds of years. Some olive trees are more than a thousand years old.