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The time-period between the eras of Prophet ʿĪsā عَـلَيْـهِ الـسَّـلاَم and Prophet Muhammad صَلَّى الـلّٰـهُ عَلَيْهِ وَاٰلِهٖ وَسَلَّم is described as the “fatrah period”, i.e. a time without a prophet. In this period, belief in the Oneness of God (tawhīd) was sufficient for the salvation of people, as was the case for the noble parents of the Final Prophet صَلَّى الـلّٰـهُ عَلَيْهِ وَاٰلِهٖ وَسَلَّم who were monotheists.