Qur'an 23:1-2 Al-Mu'minun

قَدْ أَفْلَحَ ٱلْمُؤْمِنُونَ ٱلَّذِينَ هُمْ فِى صَلَاتِهِمْ خَٰشِعُونَ

Certainly will the believers have succeeded:They who are during their prayer humbly submissive

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