1. God will kill men, have their children smashed, and have their wives raped [Isaiah 13:16-16] 2. God will punish children for the inequities of their fathers and distant ancestors [Isaiah 14:21 3. God will lay waste to entire cities and make the lands desolate [Jeremiah 4:7] 4. God will set people, animals, and even plants on fire because of his anger [Jeremiah 7:20] 5. God will send so much evil that people would rather be dead than suffer [Jeremiah 8:3] 6. God will give away the property of men, including their wives, to other men [Jeremiah 8:10] 7. God will kill young men, and their children will die from a famine [Jeremiah 11:22 8. God will cause everyone to become drunk so that father and son will kill one another [Jeremiah 13:14] 9. God will make people hungry enough to eat their own children and friends [Jeremiah 19:9] 10. God will burn entire cities with the inhabitants still inside [Jeremiah 50:32 11. God will break people's bones and knock out their teeth with stones [Lamentations 3:1-16] 12. God will force fathers and sons to eat each other and scatter their remembrance [Ezekiel 5:10] 13. God will be comforted by killing everyone with pestilence, plagues, and swords [Ezekiel 5:12-13] 14. God will kill righteous men and forget their good deeds if thy ever turn to sin [Ezekiel 18:24] 15. God will turn daughters into whores and wives into adulterers [Hosea 13:8] 16. God will kill children and unborn fetuses because their parents worship other gods [Hosea 13:16] 17. God will sell children of Israel into slavery in a far away land [Joel 3:8] 18. God will kill inhabitants of entire cities if they have a corrupt government [Micah 3:9-12] 19. God will consume every living thing from the face of the earth [Zephaniah 1:2-3] 20. God will send people to steal Jerusalem, rape the women, and enslave the rest [Zechariah 14:2] 21. God will send plagues on people and animals to rot away their tongues and eyes [Zechariah 14:12-15]
The prophets warn us of the OT god's frightful, futuristic return to the earth, at which point he'll initiate every category of curse imaginable on the people who ignore his commandments, refuse to worship him, or commit acts that he arbitrarily deems evil. It's remarkable that he can dish out such unfathomable punishments for reasons a typical person would consider lacking in foundation, yet he becomes terribly enraged when one of us follow suits.
And remember Jesus did not invalidate any of these with his teachings. They were never to be cast aside. "Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfill the law" [Matthew 5:18]
I didn't make up this information. It's all there, in the inerrant scripture, in the words of the Big Daddy, himself. Link