Surat Al-'Isrā' - سورة الإسراء

وَيَدْعُ الْإِنسَانُ بِالشَّرِّ دُعَاءَهُ بِالْخَيْرِ ۖ وَكَانَ الْإِنسَانُ عَجُولًا

Muhsin Khan: And man invokes (Allah) for evil as he invokes (Allah) for good and man is ever hasty [i.e., if he is angry with somebody, he invokes (saying): "O Allah! Curse him, etc." and that one should not do, but one should be patient].