Nafi’ (may Allah have mercy on him) says that once we were sitting with Sayyiduna Ibn Umar (may Allah be pleased with them) when a man came and said,“So-and-so from Syria sends you greetings.”He replied,“I have heard that he has adopted a new opinion. If this is true, then do not convey my greetings to him, because I heard the Prophet (peace and blessings be upon him) say that in this Ummah too, there will be people whose forms will be transformed and stones will rain down upon them. Remember, this will happen to those who deny destiny or are heretics.”