Abu Huraira reported: It was said, “O Messenger of Allah, pray against the idolaters!” The Messenger of Allah, peace and blessings be upon him, said, “Verily, I was not sent to invoke curses, but rather I was only sent as mercy.”

Source: Sahih Muslim 2599

Grade: Sahih (authentic) according to Muslim

عَنْ أَبِي هُرَيْرَةَ قَالَ قِيلَ يَا رَسُولَ اللَّهِ ادْعُ عَلَى الْمُشْرِكِينَ قَالَ إِنِّي لَمْ أُبْعَثْ لَعَّانًا وَإِنَّمَا بُعِثْتُ رَحْمَةً

2599 صحيح مسلم كِتَاب الْبِرِّ وَالصِّلَةِ وَالْآدَابِ إن اللعانين لا يكونون شهداء ولا شفعاء يوم القيامة