Abu Huraira said that when God’s Messenger wished to invoke a curse or a blessing on someone he stood in supplication after bowing, and when he said,“God listens to him who praises Him,”he often said,“Praise be to Thee, our Lord! O God, rescue al-Walid b. al-Walid, Salama b. Hisham and ‘Ayyash b. Abu Rabi'a.1 O God, trample severely on Mudar and cause them a famine like that of Joseph,”2 saying that in a loud voice. And he would sometimes say in the course of his prayer,“O God, curse so and so and so and so of the tribes of the Arabs,”till God revealed,“You have nothing to do with the matter. . .”3 1. These were men who were persecuted for their faith and held prisoners. 2. The famine in the time of Joseph lasted seven years. 3. Al-Qur’an; 3:128. (Bukhari and Muslim.)