Abu'l-'Asakir Jaysh (born c. 882) was the third Emir of the Tulunids in Egypt (896). The eldest son of Khumarawaih, he succeeded him early in 896 at the age of fourteen. Soon afterwards he ordered the execution of his uncle Mudar ibn Ahmad ibn Tulun. After ruling for only a couple of months the faqihs and qadis declared him deposed and he was thrown in prison. He was replaced with his younger brother Harun.