و درود خدا بر او فرمود: (آنگاه که خبر کشته شدن محمد بن ابی بکر را به او دادند فرمود:) همانا اندوه ما بر شهادت او، به اندازه شادی شامیان… When the news of killing of Muhammad ibn Abi Bakr reached Amir al-Mu'minin, peace be upon him, he said: Our grief over him is as great as…

وَ قَالَ (عليه السلام): لَمَّا بَلَغَهُ قَتْلُ مُحَمَّدِ بْنِ أَبِي بَكْرٍ:

إِنَّ حُزْنَنَا عَلَيْهِ عَلَي قَدْرِ سُرُورِهِمْ بِهِ، إِلَّا أَنَّهُمْ نَقَصُوا بَغِيضاً وَ نَقَصْنَا حَبِيباً

When the news of killing of Muhammad ibn Abi Bakr reached Amir al-Mu'minin, peace be upon him, he said: Our grief over him is as great as their (i.e. enemy'a) joy for it, except that they have lost an enemy and we have lost a friend.

Source: Nahj al-Balagha, compiled by al-Sharif al-Radi. Persian: ترجمه محمد دشتی (Mohammad Dashti). English: Translation by Sayed Ali Reza (letters, sayings and sermons 1–16). Text from github.com/WWGTX/NahjulBalaghah. · Free for non-commercial religious use, with attribution