The Indivisible One – Allah-azwj
وَجَعَلْنَا عَلَىٰ قُلُوبِهِمْ أَكِنَّةً أَنْ يَفْقَهُوهُ وَفِي آذَانِهِمْ وَقْرًا ۚ وَإِذَا ذَكَرْتَ رَبَّكَ فِي الْقُرْآنِ وَحْدَهُ وَلَّوْا عَلَىٰ أَدْبَارِهِمْ نُفُورًا {46}
And We Make a covering to be upon their hearts lest they understand it, and a heaviness to be in their ears. And whenever you mention your Lord in the Quran as being One, they turn around upon their backs in aversion [17:46]
عن أبي حمزة، عن أبي جعفر (عليه السلام)، قال: «كان رسول الله (صلى الله عليه و آله) يجهر ب بِسْمِ اللَّهِ الرَّحْمنِ الرَّحِيمِ و يرفع صوته بها، فإذا سمع المشركون ولوا مدبرين، فأنزل الله: وَ إِذا ذَكَرْتَ رَبَّكَ فِي الْقُرْآنِ وَحْدَهُ وَلَّوْا عَلى أَدْبارِهِمْ نُفُوراً
From Abu Hamza,
From Abu Ja’far-asws having said: ‘Rasool Allah-saww used to recite: ‘In the Name of Allah-azwj, the Beneficent, the Merciful’ (بِسْمِ اللَّهِ الرَّحْمنِ الرَّحِيمِ) loudly and raise his voice by it. Whenever the Polytheists heard it, they turned back. So Allah-azwj Revealed: And We Make a covering to be upon their hearts lest they understand it, and a heaviness to be in their ears. And whenever you mention your Lord in the Quran as being One, they turn around upon their backs in aversion [17:46]’.[1]
[1] Tafseer Abu Hamza Al Sumaly – H 12