Num Numbers, chapter Book of Numbers, chapter 29
“For the next six days of the festival, you must also bring animals to sacrifice. On the second day, bring twelve bulls. On the third/next day, bring eleven bulls. One the fourth/next day, bring ten bulls. On the fifth/next day, bring nine bulls. On the sixth/next day, bring eight bulls. On the seventh/last day, bring seven bulls. But on each of those days, all the other sacrifices and offerings that you bring will remain the same.