Wiktionary
patience of job
n. (context idiomatic English) A great amount of patience.
Usage examples of "patience of job".
There must be plenty of such ladies in Heaven, as it takes a saintly disposition and the patience of Job to be a reference librarian and to stick with it for forty years.
They have the patience of Job, though, which makes sense considering they don't die.
Yet of the making of fire, even if by such expedient as the friction of two sticks (which once I was forced by circumstance to attempt, and would try the patience of Job), as of every other salutary art, his race is as utterly ignorant as of the moons of Jupiter but lately found by some Italian with an optic glass.