hadith
3172
۞
The Prophet (SAWA) said, ‘If you were to pray so much that you became [as thin as strings], and fasted so much that you [bent over] as arches, Allah would not accept any of it unless it was accompanied by piety.
رسولُ اللهِ (صَلَّيَ اللهُ عَلَيهِ وَ آلِهِ): لَو صَلَّيتُم حتّى تَكونُوا كالأوتارِ، وصُمتُم حتّى تَكُونُوا كالحَنايا، لَم يَقبَلِ اللّهُ مِنكُم إلّا بِوَرَعٍ .