In the year 774 AH, Al-Mu'taḍid appointed his son Al-Mufawwaḍ as heir apparent. In the first year of the following century, Al-Mu'taḍid deposed Al-Mufawwaḍ from the succession and appointed his nephew in his place. In that same year, the Caliph Al-Mu'tamid died, and his brother Al-Mu'taḍid became Caliph. Khumarawayh seized this opportunity to strengthen his ties with the new Caliph. He sent Al-Husayn ibn Abd Allah, known as Ibn Al-Qassar, to Baghdad with a delegation. The delegation informed the Caliph that Egypt would pay the annual tribute of one hundred thousand dinars, and that it would also pay an additional fifty thousand dinars for the preceding years. The Caliph confirmed Khumarawayh in his principality for a period of ten years, over the territories that had been under his or his father's rule. He also sent him the sword and robe of investiture. Khumarawayh paid the first installment, but then gradually delayed further payments. However, he did not neglect to foster friendly relations with the Caliph. He sent him a delegation to propose the marriage of his daughter, Qatr Al-Nada, to Al-Mu'taḍid's son. The Caliph accepted, and the wedding was arranged. This caused great joy to the people of Egypt. Qatr Al-Nada was escorted by her mother, Al-Abbasah bint Ahmad ibn Tulun, to the borders of Egypt towards Syria. There, she settled and pitched her tents, and a village was built and named after her, or it was called Al-Abbasah. Once peace was established with the Caliph, Khumarawayh expanded his authority. He ordered Tughj ibn Juff, the governor of Damascus, to advance with a contingent of Tarsus soldiers into Roman territory. They fought the Romans, captured several cities, and returned with spoils. In the year 387 AH, the same year as the wedding of Qatr Al-Nada, Khumarawayh was assassinated in Damascus. It was reported to him that there was a secret love affair between some of his wives and some of his senior servants. This angered him, and he began to investigate the matter and confirm the guilt of the perpetrators, intending to punish them justly. These individuals, fearing severe punishment, conspired with his wives to kill him so they could escape his wrath. They killed him in his bed one night. Others have given different accounts of his assassination. After his death, twenty servants suspected of involvement were arrested. Following an investigation, it was confirmed that twenty were guilty and sentenced to death. Khumarawayh's body was transported to Egypt and buried next to his father's body. His reign lasted for twenty-one years and seven months. He was an excellent calligrapher. Upon his death, his son, الجيش, known as Abu Al-Juyush, was appointed as his successor. He was still a minor.