'Ubaydullah ibn 'Abdullah said, "Mu'awiya went on his first hajj when he was the khalifa and 'Uthman ibn Hanif al-Ansari came to him and said, 'Peace be upon you, Amir, and the mercy of Allah.' The people of Syria objected to that and said, 'Who is this hypocrite who shortens the greeting of the Amir al-Mu'minin!' 'Uthman made his camel kneel and said, 'Amir al-Mu'minin! These men object to something which you know better than them. By Allah, I used to this greeting for Abu Bakr, 'Umar, and 'Uthman, and none of them objected to it.' Mu'awiya said to those of the people of Syria who had spoken, 'Take it easy! It was partly as he stated. But when the civil war engaged the people of Syria, they said, "Do not shorten the greeting of our khalifa in our presence (i.e. from Amir al-Mu'minin to Amir)." People of Madina, I will treat you as friends even though you use 'Amir" for a zakat collector.'"  

فَقَالَ مُعَاوِيَةُ لِمَنْ تَكَلَّمَ مِنْ أَهْلِ الشَّامِ عَلَى رِسْلِكُمْ فَإِنَّهُ قَدْ كَانَ بَعْضُ مَا يَقُولُ وَلَكِنَّ أَهْلَ الشَّامِ قَدْ حَدَثَتْ هَذِهِ الْفِتَنُ قَالُوا لاَ تُقَصَّرُ عِنْدَنَا تَحِيَّةُ خَلِيفَتِنَا فَإِنِّي إِخَالُكُمْ يَا أَهْلَ الْمَدِينَةِ تَقُولُونَ لِعَامِلِ الصَّدَقَةِ أَيُّهَا الأمِيرُ