Al-Ahnaf bin Qays (may Allah have mercy on him) says that Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) used to stipulate for the dhimmis the hospitality of one day and night, and that they repair bridges; and if someone was killed among them, they would pay his blood money.
Another narrator reported from Hisham (may Allah have mercy on him): If a man of the Muslims is killed in their land, they shall pay his blood money.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجزية / 18688