Musnad Ahmad Hadith 23110

Abu Imran (may Allah have mercy on him) says that I said to Jundub that I have pledged allegiance to Abdullah bin Zubair (may Allah be pleased with him). These people want me to go with them to Syria. Jundub said, "Do not go." I said, "They will not let me do otherwise." He said, "Save yourself by giving financial ransom." I said, "They are not willing to accept anything except that I go with them and display my swordsmanship." Upon this, Jundub said, "Such-and-such a person narrated this hadith to me, that the Messenger of Allah (ﷺ) said: On the Day of Resurrection, the murdered person will bring his killer before Allah and say, 'O Lord! Ask him for what reason he killed me?' So Allah will ask him, 'For what reason did you kill him?' He will say, 'Because of so-and-so's government.' Therefore, you should beware of this."