At-Tabarī
According to the general books of Islamic history, the conquest of the Spanish section of the Iberian Peninsula is attributed to Tariq ibn-Ziyad and Musa bin Nusair in 711 - 712, in the time of the Umayyad Caliph, al-Walid I (Walid ibn Abd al-Malik). According to Muslim historian Muhammad ibn Jarir al-Tabari, Spain was first invaded some sixty years earlier during the caliphate of Uthman. Other prominent Muslim historians like, Ibn Kathir, have also quoted the same narration.