Bible promises for those who are fearful and angry because of injustice

 In God (I will praise His word), In God I have put my trust; I will not fear. What can flesh do to me? All day they twist my words; All their thoughts are against me for evil... Put my tears into Your bottle; Are they not in Your book? When I cry out to You, Then my enemies will turn back; This I know, because God is for me. In God (I will praise His word), In the Lord (I will praise His word), In God I have put my trust; I will not be afraid. What can man do to me?" Psalm 56:4-5, 8-11. "The fear of man brings a snare, but whoever trusts in the Lord shall be safe." Proverbs 

"Rest in the Lord, and wait patiently for Him; Do not fret because of him who prospers in his way, Because of the man who brings wicked schemes to pass. Cease from anger, and forsake wrath; Do not fret—it only causes harm. For evildoers shall be cut off; But those who wait on the Lord, They shall inherit the earth... the meek shall inherit the earth, and shall delight themselves in the abundance of peace." Psalm 37:7-9, 11

"I said, 'I will guard my ways, Lest I sin with my tongue; I will restrain my mouth with a muzzle, While the wicked are before me.' I was mute with silence, I held my peace even from good; And my sorrow was stirred up. My heart was hot within me; While I was musing, the fire burned. Then I spoke with my tongue: 'Lord, make me to know my end, And what is the measure of my days, that I may know how frail I am. Indeed, You have made my days as handbreadths, and my age is as nothing before You; Certainly every man at his best state is but vapor. Selah" Psalm 39:1-5

“All flesh is as grass, And all the glory of man as the flower of the grass. The grass withers, And its flower falls away, But the word of the Lord endures forever.” 1 Peter 1:24-25. 29:25. "As a father pities his children, So the Lord pities those who fear Him. For He knows our frame; He remembers that we are dust. As for man, his days are like grass; As a flower of the field, so he flourishes. For the wind passes over it, and it is gone, And its place remembers it no more. But the mercy of the Lord is from everlasting to everlasting on those who fear Him, and His righteousness to children’s children, To such as keep His covenant, And to those who remember His commandments to do them." Psalm 103:13-18

“Blessed are the poor in spirit, For theirs is the kingdom of heaven. Blessed are those who mourn, For they shall be comforted. Blessed are the meek, For they shall inherit the earth. Blessed are those who hunger and thirst for righteousness, For they shall be filled. Blessed are the merciful, For they shall obtain mercy. Blessed are the pure in heart, For they shall see God. Blessed are the peacemakers, For they shall be called sons of God. Blessed are those who are persecuted for righteousness’ sake, For theirs is the kingdom of heaven. Matthew 5:3-10