And his sons went and feasted in their houses, every one his day; and sent and called for their three sisters to eat and to drink with them.

Job’s sons would take turns holding feasts in their homes, and they would invite their three sisters to eat and drink with them.

And it was so, when the days of their feasting were gone about, that Job sent and sanctified them, and rose up 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.

And when the days of feasting were over, Job would send for his children to purify them, rising early in the morning to offer burnt offerings for all of them. For Job thought, “Perhaps my children have sinned and cursed God in their hearts.” This was Job’s regular practice.