1. Your twins are so mischievous, but you never lose your temper. You have the patience of Job.
2. That teacher must have the patience of Job —he answers all of the students’ questions and waits for them to be quiet before he continues.

The word Job is a name (it rhymes with robe). The expression originates from the Biblical story of Job, a man who was able to keep his faith despite the hardships God inflicted on him during a contest with the devil.