The Quran Verses
Surah 11:50: (Hud to the people of ‘Ad)
Surah 11:61: (Salih to the people of Thamud)
Hud and Salih are "Arabian prophets" who appear nowhere in the Bible or any pre-Islamic Jewish or Christian records.
Scholars suggest these figures represent the retrofitting of local Arabian oral legends into the biblical prophetic framework.
By placing Hud and Salih alongside Noah and Abraham, the Quran attempts to give the Arabs their own indigenous "monotheistic antiquity."
To the critic, this is an obvious case of syncretism, blending regional pagan history with biblical themes to make Islam feel culturally native to the Arabian Peninsula.