They were confounded because they had hoped - The caravans of Tema and Sheba. The word "confounded" here means ashamed. It represents the state of feeling which one has who has met with disappointment. He is perplexed, distressed, and ashamed that he had entertained so confident hope; see the notes at Isaiah 30:5. They were downcast and sad that the waters had failed, and they looked on one another with confusion and dismay. There are few images more poetic than this, and nothing that would more strikingly exhibit the disappointment of Job, that he had looked for consolation from his friends, and had not found it. He was down-cast, distressed, and disheartened, like the travelers of Tema and of Sheba, because they had nothing to offer to console him; because he had waited for them to sustain him in his afflictions, and had been wholly disappointed.

And they were confounded because they had hoped,.... When they came to the places where they hoped to find water, finding none were ashamed of their vain hope, and reflected upon themselves for being so foolish as to raise their expectations upon such a groundless surmise:
they came thither, and were ashamed; which is the same thing expressed in different words; and aptly enough describes Job's disappointment in not meeting with that relief and comfort he expected from his friends, to whom he makes application of all this in the following words.

literally, "each had hoped"; namely, that their companions would find water. The greater had been their hopes the more bitter now their disappointment;
they came thither--to the place.
and were ashamed--literally, "their countenances burn," an Oriental phrase for the shame and consternation of deceived expectation; so "ashamed" as to disappointment (Romans 5:5).

Hoped - They comforted themselves with the expectation of water. Ashamed - As having deceived themselves and others. We prepare confusion for ourselves, by our vain hopes: the reeds break under us, because we lean upon them.