Leviticus 23:27-29 "Also the tenth day of this seventh month shall be the Day of Atonement. It shall be a holy convocation for you; you shall afflict your souls, and offer an offering made by fire to the LORD. And you shall do no work on that same day, for it is the Day of Atonement, to make atonement for you before the LORD your God. For any person who is not afflictedin soul on that same day shall be cut off from his people.
Leviticus 23:32 It shall be to you a sabbath of solemn rest, and you shall afflict your souls; on the ninth day of the month at evening, from evening to evening, you shall celebrate your sabbath."
Isaiah 58:3-6 'Why have we fasted,' they say, 'and You have not seen? Why have we afflicted our souls, and You take no notice?' "In fact, in the day of your fast you find pleasure, And exploit all your laborers. Indeed you fast for strife and debate, And to strike with the fist of wickedness. You will not fast as you do this day, To make your voice heard on high. Is it a fast that I have chosen, A day for a man to afflict his soul? Is it to bow down his head like a bulrush, And to spread out sackcloth and ashes? Would you call this a fast, And an acceptable day to the LORD? "Is this not the fast that I have chosen: To loose the bonds of wickedness, To undo the heavy burdens, To let the oppressed go free, And that you break every yoke?
Leviticus 16:29-31 "This shall be a statute forever for you: In the seventh month, on the tenth day of the month, you shall afflict your souls, and do no work at all, whether a native of your own country or a stranger who dwells among you. For on that day the priest shall make atonement for you, to cleanse you, that you may be clean from all your sins before the LORD. It is a sabbath of solemn rest for you, and you shall afflict your souls. It is a statute forever.
Acts 27:9 Now when much time had been spent, and sailing was now dangerous because the Fast was already over, Paul advised them,
Deuteronomy 9:18 And I fell down before the LORD, as at the first, forty days and forty nights; I neither ate bread nor drank water, because of all your sin which you committed in doing wickedly in the sight of the LORD, to provoke Him to anger.
Esther 4:16 “Go, gather all the Jews who are present in Shushan, and fast for me; neither eat nor drink for three days, night or day. My maids and I will fast likewise. And so I will go to the king, which is against the law; and if I perish, I perish!”