Leviticus 23:37-38

“These are the appointed feasts of GOD which you will decree as sacred assemblies for presenting Fire-Gifts to GOD: the Whole-Burnt-Offerings, Grain-Offerings, sacrifices, and Drink-Offerings assigned to each day. These are in addition to offerings for GOD’s Sabbaths and also in addition to other gifts connected with whatever you have vowed and all the Freewill-Offerings you give to GOD.