Exodus 12:14

12:14 This day will become a memorial for you, and you will celebrate it as a festival to the Lord – you will celebrate it perpetually as a lasting ordinance.

Exodus 12:42

12:42 It was a night of vigil for the Lord to bring them out from the land of Egypt, and so on this night all Israel is to keep the vigil to the Lord for generations to come.

Exodus 16:25

16:25 Moses said, “Eat it today, for today is a Sabbath to the Lord; today you will not find it in the area.

Isaiah 58:5

58:5 Is this really the kind of fasting I want?

Do I want a day when people merely humble themselves,

bowing their heads like a reed

and stretching out on sackcloth and ashes?

Is this really what you call a fast,

a day that is pleasing to the Lord?

Zechariah 7:5-6

7:5 “Speak to all the people and priests of the land as follows: ‘When you fasted and lamented in the fifth and seventh months through all these seventy years, did you truly fast for me – for me, indeed? 7:6 And now when you eat and drink, are you not doing so for yourselves?’”