A Proclaimer, The Caller
وَنَادَىٰ أَصْحَابُ الْجَنَّةِ أَصْحَابَ النَّارِ أَنْ قَدْ وَجَدْنَا مَا وَعَدَنَا رَبُّنَا حَقًّا فَهَلْ وَجَدْتُمْ مَا وَعَدَ رَبُّكُمْ حَقًّا ۖ قَالُوا نَعَمْ ۚ فَأَذَّنَ مُؤَذِّنٌ بَيْنَهُمْ أَنْ لَعْنَةُ اللَّهِ عَلَى الظَّالِمِينَ {44}
And the dwellers of the paradise will call out to the inmates of the Fire, ‘Surely, we have found what our Lord Promised us, to be true; so did you (also) find what your Lord Promised you, to be true?’ They will say, ‘Yes’. Then a ‘مُؤَذِّنٌ’ proclaimer would proclaim among them: ‘The Curse of Allah is on the unjust [7:44]
علي بن إبراهيم، قال: حدثني أبي، عن محمد بن الفضيل، عن أبي الحسن (عليه السلام)، قال: «المؤذن: أمير المؤمنين (صلوات الله عليه)، يؤذن أذانا يسمع الخلائق كلها، و الدليل على ذلك قول الله عز و جل في سورة براءة: وَ أَذانٌ مِنَ اللَّهِ وَ رَسُولِهِ فقال أمير المؤمنين (عليه السلام): كنت أنا الأذان في الناس
Ali Bin Ibrahim said, ‘My father narrated to me, from Muhammad Bin Al Fazeyl,
(It has been narrated) from Abu Al-Hassan-asws having said: ‘The proclaimer (المؤذن) is Amir Al-Momineen-asws, who would proclaim (أذانا) which all the creatures would hear. And the evidence upon that are the Words of Allah-azwj Mighty and Majestic in Surah Bara’at (Chapter 9): And a proclamation from Allah and His Rasool [9:3]. Thus, Amir Al-Momineen-asws said: ‘I-asws was the proclamation among the people’’.[1]
[1] تفسير القمّي 1: 231