Complex sentence: She and her husband, Abdullah ibn Abdul Asad, was among the first who converted to Islam and had suffered at the hands of the Quraish who had tried to force them to abandon their new faith.
Split into simpler sentences: She and her husband, Abdullah ibn Abdul Asad, was among the first who converted to Islam. They had suffered at the hands of the Quraish who had tried to force them to abandon their new faith.