Leviticus 23:37
These are the set feasts of Jehovah, which ye shall proclaim as holy convocations, to present an offering by fire to Jehovah, a burnt-offering, and an oblation, a sacrifice, and drink-offerings, everything upon its day;
Leviticus 23:2
Speak unto the children of Israel, and say unto them, Concerning the set feasts of Jehovah, which ye shall proclaim as holy convocations these are my set feasts.
Leviticus 23:4
These are the set feasts of Jehovah, holy convocations, which ye shall proclaim in their seasons:
Deuteronomy 16:16-17
Three times in the year shall all thy males appear before Jehovah thy God in the place which he will choose, at the feast of unleavened bread, and at the feast of weeks, and at the feast of tabernacles; and they shall not appear before Jehovah empty:
Ecclesiastes 3:1
To everything there is a season, and a time to every purpose under the heavens: