Surely thou hast been so hard-hearted as to deny a cup of cold water to those that needed and desired it. Water was ofttimes scarce and precious in those hot countries, and was appropriated to particular persons, without whose leave other persons might not take it. To the weary, i.e. to him who by reason of hard labour or travel is weary and thirsty. So this word is used Proverbs 25:25. From the hungry, to whom it was due by God's law, Proverbs 3:27, which also was known to Job by the light of nature. Hereby he intimates the greatness of this sin of uncharitableness, by ranking it with heinous crimes; whereas Job (as he thought) esteemed it but a small fault, if any.
Related Commentaries of Job 22:7
Job 22:7
7 Thou hast not given water to the weary to drink, and thou hast withholden bread from the hungry.