Midras Yehezkiel 35:14: Midrash Tehillim

Let us rejoice to God. This is what the verse says (Zephaniah 3:14): "Sing, daughter of Zion; shout aloud, O Israel! Be glad and rejoice with all your heart, Daughter Jerusalem!" On what matter (Micah 7:9) has your enemy been deprived of his right to rule? All rejoice at the downfall of the wicked. And similarly, it says (Isaiah 14:5-6): "The Lord has broken the rod of the wicked, the scepter of the rulers, which in anger struck down peoples with unceasing blows, and in fury subdued nations with relentless aggression." What is written (ibid. 14:7)? "All the lands are at rest and at peace; they break into singing." And it says (Ezekiel 32:31): "All the earth's kings lie in state, each in his own tomb. But you are cast out of your tomb like a rejected branch; you are covered with the slain, with those pierced by the sword, those who descend to the stones of the pit. Like a corpse trampled underfoot." When is the earth joyful? When I make you desolate. And similarly, it says (Psalms 149:6): "Let the high praises of God be in their mouths and a double-edged sword in their hands." And it says (Proverbs 11:10): "When the wicked perish, there is rejoicing." Let us approach Him with thanksgiving, let us sing psalms to Him, great is the power of gratitude. And similarly, Jonah says (Jonah 2:10): "And I, with a song of thanksgiving, will sacrifice to You."