Leviticus 23:37-38

(“ ‘These are the LORD’s special feasts, when there will be holy meetings and when you bring offerings made by fire to the LORD. You will bring whole burnt offerings, grain offerings, sacrifices, and drink offerings—each at the right time. These offerings are in addition to those for the LORD’s Sabbath days, in addition to offerings you give as payment for special promises, and in addition to special offerings you want to give to the LORD.)