Tafheem-ul-Quran (En) - Al-Israa : 110
قُلِ ادْعُوا اللّٰهَ اَوِ ادْعُوا الرَّحْمٰنَ١ؕ اَیًّا مَّا تَدْعُوْا فَلَهُ الْاَسْمَآءُ الْحُسْنٰى١ۚ وَ لَا تَجْهَرْ بِصَلَاتِكَ وَ لَا تُخَافِتْ بِهَا وَ ابْتَغِ بَیْنَ ذٰلِكَ سَبِیْلًا
Say to them (O Prophet!): "Call upon Him as Allah or call upon Him as al-Rahman; call Him by whichever name you will, all His names are beautiful. 123 Neither offer your Prayer in too loud a voice, nor in a voice too low; but follow a middle course." 124
123. This is the answer to another objection of the disbelievers. They said: We have heard the name Allah for the Creator but where from have you brought the name Rahman? This was because the name "Rahman”was not used for Allah and they did not like it. 124. This instruction was given at Makkah. Ibn Abbas relates that when the Prophet (peace be upon him) or his companions offered their prayers, they recited the Quran in a loud voice. At this the disbelievers would raise a hue and cry and often called them names. Therefore, they were enjoined that they should neither say their prayers in such a loud voice as might incite the disbelievers nor should they say it in such a low voice that their own companions might not hear it. This instruction was discontinued under the changed conditions at Al-Madinah. However, if the Muslims have to face the same conditions, at any place or at any time, they should observe the same instruction.
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