What did the Prophet Muhammad (saw) say when Tufail bin `Amr asked him to invoke Allah against the Daus (nation) for refusing to accept Islam?
 Narrated Abu Huraira:                     Tufail bin `Amr came to the Prophet and said, "The Daus (nation) have perished as they disobeyed and refused to accept Islam. So invoke Allah against them." But the Prophet said, "O Allah! Give guidance to the Daus (tribe) and bring them (to Islam)!"