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tabarani:13029Bakr > ʿAbdullāh > Muʿāwiyah b. Ṣāliḥ > ʿAlī b. Abū Ṭalḥah

[Machine] Ibn Abbas said regarding His (ذو الجلال والإكرام) saying, "And do not proclaim your prayer, nor be silent in it," he (Ibn Abbas) says, "One should not perform prayer in a showy manner for the people, nor out of fear of the people."  

الطبراني:١٣٠٢٩حَدَّثَنَا بَكْرٌ ثنا عَبْدُ اللهِ حَدَّثَنِي مُعَاوِيَةُ بْنُ صَالِحٍ عَنْ عَلِيِّ بْنِ أَبِي طَلْحَةَ

عَنِ ابْنِ عَبَّاسٍ فِي قَوْلِهِ {وَلَا تَجْهَرْ بِصَلَاتِكِ وَلَا تُخَافِتْ بِهَا} يَقُولُ «لَا يُصَلِّي مُرَابِيًا لِلنَّاسِ وَلَا يَدَعُهَا مَخَافَةَ النَّاسِ»