5 And it was so, when the days of [their] feasting were ended, that Job sent and sanctified them, and rose early in the morning, and offered burnt-offerings [according] to the number of them all; for Job said, It may be that my sons have sinned, and cursed God in their hearts. Thus did Job continually.
5
When a period of feasting had run its course, Job would make arrangements for them to be purified. Early in the morning he would sacrifice a burnt offering for each of them, thinking, “Perhaps my children have sinned and cursed God in their hearts.” This was Job’s regular custom.