Leviticus 23:37
These are the set feasts of Jehovah, which ye shall proclaim to be holy convocations, to offer an offering made by fire unto Jehovah, a burnt-offering, and a meal-offering, a sacrifice, and drink-offerings, each on its own day;
Leviticus 23:2
Speak unto the children of Israel, and say unto them, The set feasts of Jehovah, which ye shall proclaim to be holy convocations, even these are my set feasts.
Leviticus 23:4
These are the set feasts of Jehovah, even holy convocations, which ye shall proclaim in their appointed season.
Deuteronomy 16:16-17
Three times in a year shall all thy males appear before Jehovah thy God in the place which he shall choose: in the feast of unleavened bread, and in the feast of weeks, and in the feast of tabernacles; and they shall not appear before Jehovah empty:
Ecclesiastes 3:1
For everything there is a season, and a time for every purpose under heaven: