On the day of Siffin, I was with Sayyiduna Ali (may Allah be pleased with him). The call to prayer was given, both armies performed the prayer. Then I asked: "What is the ruling regarding those killed from among us and them?" He replied: "Whoever among us or among them sought the Face of Allah and the Hereafter will go to Paradise."
Hadith Referenceسنن سعید بن منصور / كتاب الجهاد / 4144
Hadith Gradingمحدثین:إسناده حسن
Hadith Takhrij«إسناده حسن، وأخرجه سعيد بن منصور فى «سننه» ترقيم الدرالسلفية برقم:، 2968، وابن أبى شيبة فى «مصنفه» برقم: 39035، والطبراني فى«الكبير» برقم: 688»