Charles Ellicott Commentary Job 5:17

"Behold, happy is the man whom God correcteth: Therefore despise not thou the chastening of the Almighty." — Job 5:17 (ASV)

This is probably the original of Proverbs 3:12, which is itself quoted by the writer of the Epistle to the Hebrews (Job 12:5), while the spirit of it is expressed by St. James and St. John in the Revelation. (See the margin.) This is the only place in Job in which the word here used for happy—which is the very first word of the Psalms, and is used twenty-five times in them alone—is found.