"Will you be angry with us forever?" (Psalm 85:5, NIV).
"Restore us to yourself, LORD, that we may return; renew our days as of old unless you have utterly rejected us and are angry with us beyond measure" (Lam. 5:21-22, NIV).
"Surely the wrath of man shall praise you; the remnant of wrath you will put on like a belt [restrain]" (Psalm 76:10, ESV).
"Has God forgotten to be gracious? Has he in anger shut up his compassion?" (Psalm 77:9, ESV).
"God is a righteous judge, a God who displays his wrath every day" (Psalm 7:11, NIV). It's a good thing He "has not appointed us to wrath" (cf. 1 Thess. 5:9). In the KJV it says "God is angry with the wicked every day." Yes, God is not only a God of mercy but of justice and its consequence, wrath at the evil that must be judged, because God is holy. The fortunate thing is that He is not angry at us, but that wrath was diverted at the cross. We can also know that God's delights to show mercy and doesn't stay angry forever (cf. Micah 7:18). Also: "For His anger is but for a moment..." (Psalm 30:5, NASB). And God tempers His wrath with mercy (cf. Heb. 3:2).
We are warned in Romans 11:22 to "behold the goodness and severity of God" and realize that God means business! When He chastises us, it isn't because He's angry at us, but about us, and we must suffer from our sins, not for them. Man's anger doesn't achieve the righteousness of God and we are admonished to cease from anger and forsake wrath in Scripture. The unbeliever suffers because "the wrath of God abides on him." We are delivered from the wrath to come, according to 1 Thess. 1:10. Proverbs advise: We are to avoid a man of quick temper, lest we learn his ways, and yet we are to fear God, for "His wrath is quickly kindled" (cf. Psalm 2:12).
One word of encouragement is that "the Lord is slow to anger" and "His patience means our salvation!" Don't ask God to judge someone hastily, because He had so much patience with you. God will someday mete out His justice and meet its demands, and we will no longer suffer indirectly from His wrath, which glorifies Him, even from the wrath of man (cf. Psalm 76:10)--"Surely your wrath against mankind brings you praise and the survivors of your wrath are restrained" (Psalm 76:10, NIV). Soli Deo Gloria!