Philip the Arab and Christianity that appear—save for one reference to Ishmael—figure in the political history of the first three centuries of the Christian era. To Eusebius, the Saracens of the 4th century are direct-line descendants of the biblical Ishmaelites, descendants of the handmaid, Hagar, and the patriarch, Abraham. They are thus outcasts, beyond God's Covenant with the favored son of Abraham, Isaac. The twin images of the Ishmaelite and the Saracen—outcasts and "latrones", raiders of the frontiers—reinforce each other and give Eusebius' portrait of the Arab nation an unhappy color. He may have been reluctant to associate the first Christian emperor with a people
Ishmael the P, or Priestly source, and the E, or Elohist source (See Documentary hypothesis). For example, the narration in is of J type and the narration in is of E type. Jewish and Islamic traditions consider Ishmael to be the ancestor of Arab people. Some Pre-Islamic poetry mentions Ishmael, his father Abraham, and the sacrifice story, such as the Pre-Islamic poet "Umayyah Ibn Abi As-Salt", who said in one of his poems: بكره لم يكن ليصبر عنه أو يراه في معشر أقتال ([The sacrifice] of his first-born of whose separation he [Abraham] could not bear neither could he see him