Matthew 6:16

14Then the disciples of John came to Him, saying, "Why do we and the Pharisees fast often, but Your disciples do not fast?" 15And Jesus said to them, "Can the friends of the bridegroom mourn as long as the bridegroom is with them? But the days will come when the bridegroom will be taken away from them, and then they will fast.

16David therefore pleaded with God for the child, and David fasted and went in and lay all night on the ground.
21Then his servants said to him, "What is this that you have done? You fasted and wept for the child while he was alive, but when the child died, you arose and ate food."

4So it was, when I heard these words, that I sat down and wept, and mourned for many days; I was fasting and praying before the God of heaven.

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!"

13But as for me, when they were sick, My clothing was sackcloth; I humbled myself with fasting; And my prayer would return to my own heart.

10When I wept and chastened my soul with fasting, That became my reproach.

24My knees are weak through fasting, And my flesh is feeble from lack of fatness.

3Then I set my face toward the Lord God to make request by prayer and supplications, with fasting, sackcloth, and ashes.

37and this woman was a widow of about eighty-four years, who did not depart from the temple, but served God with fastings and prayers night and day.

30So Cornelius said, "Four days ago I was fasting until this hour; and at the ninth hour I prayed in my house, and behold, a man stood before me in bright clothing,

2As they ministered to the Lord and fasted, the Holy Spirit said, "Now separate to Me Barnabas and Saul for the work to which I have called them." 3Then, having fasted and prayed, and laid hands on them, they sent them away.

23So when they had appointed elders in every church, and prayed with fasting, they commended them to the Lord in whom they had believed.

5Do not deprive one another except with consent for a time, that you may give yourselves to fasting and prayer; and come together again so that Satan does not tempt you because of your lack of self-control.

5in stripes, in imprisonments, in tumults, in labors, in sleeplessness, in fastings;

27in weariness and toil, in sleeplessness often, in hunger and thirst, in fastings often, in cold and nakedness--

27So it was, when Ahab heard those words, that he tore his clothes and put sackcloth on his body, and fasted and lay in sackcloth, and went about mourning.

3"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. 4Indeed 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. 5Is 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?

3and to ask the priests who were in the house of the LORD of hosts, and the prophets, saying, "Should I weep in the fifth month and fast as I have done for so many years?" 4Then the word of the LORD of hosts came to me, saying, 5"Say to all the people of the land, and to the priests: "When you fasted and mourned in the fifth and seventh months during those seventy years, did you really fast for Me--for Me?

14You have said, "It is useless to serve God; What profit is it that we have kept His ordinance, And that we have walked as mourners Before the LORD of hosts?

18The disciples of John and of the Pharisees were fasting. Then they came and said to Him, "Why do the disciples of John and of the Pharisees fast, but Your disciples do not fast?"