Job 1:4-5

4And his sons went and made a feast in the house of each one on his day; and they sent and invited their three sisters to eat and to drink with them.

5And it was so, when the days of the feasting were gone about, that Job sent and hallowed them; and he rose up early in the morning, and offered up burnt-offerings [according to] the number of them all; for Job said, It may be that my children have sinned, and cursed 1God in their hearts. Thus did Job continually.