Complex sentence: In Islam, Hagar's story is alluded to in the Qur'an, but her name is not mentioned; her role is elaborated in Hadith.Hagar was the mother of Abraham's son, Ishmael, who is regarded as the patriarch of the Ishmaelites i.e. the Arabs.
Split into simpler sentences: In Islam, her story is alluded to in the Qur'an, but her name is not mentioned. She was the mother of Abraham's son, Ishmael, who is regarded as the patriarch of the Ishmaelites i.e. the Arabs.