"And You, Lord God of Israel, awaken to punish all the nations; do not spare all the treacherous transgressors. Because in this world, the Holy One, blessed be He, appears as if He is asleep, why does justice not prevail and redeem Israel? As it is said (Psalm 44:24), "Rouse Yourself! Why do You sleep, O Lord?" But in the future, when the end comes, as if the Holy One, blessed be He, will awaken on them. As it is said, "Awaken to punish all the nations." At that time, do not spare all the treacherous transgressors."
Rouse Yourself - Why Do You Sleep O Lord
Midrash Tehillim 59:4