Job 1:4-5
4His sons used to go and hold a feast in the house of each one on his day, and they would send and invite their three sisters to eat and drink with them. 5Now it happened when the days of feasting had completed their cycle, that Job would send and set them apart as holy. And he would rise up early in the morning and offer aburnt offerings according to the number of them all; for Job said, “bPerhaps my sons have sinned and 1,ccursed God in their hearts.” Thus Job did continually.