Consider these Bible verses for your 40 day fast
Taste and see that the Lord is good;
blessed is the one who takes refuge in him.
Fear the Lord, you his holy people,
for those who fear him lack nothing.
The lions may grow weak and hungry,
but those who seek the Lord
lack no good thing.
(Psalm 34:8–10, NIV)
“Even now,” declares the Lord, “return to me with all your heart, with fasting and weeping and mourning.” (Joel 2:12, NIV)
As soon as the people heard the sound of the trumpet, the people shouted a great shout, and the wall fell down flat. (Joshua 6:20, ESV)
Listen, King Jehoshaphat and all who live in Judah and Jerusalem! This is what the Lord says to you: “Do not be afraid or discouraged because of this vast army. For the battle is not yours, but God’s.” (2 Chronicles 20:15, NIV)
Your words were found, and I ate them, and your words became to me a joy and the delight of my heart. (Jeremiah 15:16, ESV)
Finally, be strong in the Lord and in the strength of his might. Put on the whole armor of God, that you may be able to stand against the schemes of the devil. For we do not wrestle against flesh and blood, but against the rulers, against the authorities, against the cosmic powers over this present darkness, against the spiritual forces of evil in the heavenly places. (Ephesians 6:10–12, ESV)
Blessed are those who hunger and thirst for righteousness, for they shall be satisfied. (Matthew 5:6, ESV)
Behold, God is my helper;
the Lord is the upholder of my life.
(Psalm 54:4, ESV)
“My food,” said Jesus, “is to do the will of him who sent me to finish his work.” (John 4:34, NIV)
And when you fast, do not look gloomy like the hypocrites, for they disfigure their faces that their fasting may be seen by others. Truly, I say to you, they have received their reward. But when you fast, anoint your head and wash your face, that your fasting may not be seen by others but by your Father who is in secret. And your Father who sees in secret will reward you. (Matthew 6:16–18, ESV)
You are the light of the world. A city set on a hill cannot be hidden. Nor do people light a lamp and put it under a basket, but on a stand, and it gives light to all in the house. In the same way, let your light shine before others, so that they may see your good works and give glory to your Father who is in heaven. (Matthew 5:14–16, ESV)
Search me, O God, and know my heart!
Try me and know my thoughts!
And see if there be any grievous way in me,
and lead me in the way everlasting!
(Psalm 139:23–24, ESV)