[Machine] The Messenger of Allah ﷺ said, "A prayer is not accepted if a person does not maintain his firmness in bowing and prostration." Sufyan said, "This is what Al-A'mash said: It is not accepted, it does not suffice."
أَنَّ رَسُولَ اللهِ ﷺ قَالَ «لَا يُرْجَى صَلَاةٌ لَا يُقِيمُ الرَّجُلُ فِيهَا صُلْبَهُ فِي الرُّكُوعِ وَالسُّجُودِ» قَالَ سُفْيَانُ هَكَذَا قَالَ الْأَعْمَشُ لَا يُرْجَى لَا يُجْزِئُ