Scripture reports God increased by half all of Job’s things, except for the children. It is evident, therefore, that the length of his life was also increased by a half. If he had lived 170 years when he was delivered from that calamity, it appears that he lived for 85 years more to the end of his life, that is, for the number of years that is the half of 170. Now, if you add 85 years to the 170 years he had lived before, you have a sum of 255. Actually Scripture declares that Job lived 248 years, therefore those 7 years that are not included in the sum were the years of his temptation. And with good reason they were not counted, because they appear to belong to a period of death more than life. - "Commentary on Job 42.16"
