 As the veneration of saints and the belief in their ability to perform miracles by the grace of God had become one of the most omnipresent and established aspects of Sunni Muslim practice throughout the Islamic world, being an agreed-upon tenet of the faith by the vast majority of the classical scholars, it was not long before Ibn 'Abd-al-Wahhab began to encounter the omnipresence of saint-veneration in his area as well; and he probably chose to leave Najd and look elsewhere for studies to see if the honoring of saints was as popular in the neighboring places of the Muslim world.After leaving 'Uyayna, Ibn 'Abd al-Wahhab performed the Greater Pilgrimage in Mecca, where the scholars appear to have held opinions and espoused teachings that were unpalatable to him.After this, he went to Medina, the stay at which seems to have been "decisive in shaping the later direction of his thought."