Leviticus 23:37
"'These are the feasts of the LORD which ye shall proclaim holy feasts, for to offer sacrifice unto the LORD, burnt offerings, meat offerings, and drink offerings every day:
Leviticus 23:2
"Speak unto the children of Israel, and say unto them, 'These are the feasts of the LORD which ye shall call holy feasts.
Leviticus 23:4
"'These are the feasts of the LORD which ye shall proclaim holy in their seasons:
Deuteronomy 16:16-17
Three times in the year shall all your males appear before the LORD thy God in the place which he shall choose: In the feast of sweet bread, in the feast of weeks and in the feast of the tabernacles. And they shall not appear before the LORD empty:
Ecclesiastes 3:1
Every thing hath a time; yea, all that is under the heaven, hath his convenient season.