Al-Kāfi - The Book of Prayer

Chapter: Ruku‘ (Kneeling) and Readings therein and When Standing up Straight Thereafter َدُ بْنُ إِدْرِيسَ عَنْ أَحْ٠َّدٍ عَنِ الْحُسَيْنِ بْنِ سَعِيدٍ عَنِ الْقَاسِ٠َّدٍ عَنْ رَجُلٍ عَنْ أَبِي بَصِيرٍ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلا٠) قَالَ إِذَا رَفَعْتَ رَأْسَكَ ٠ِنَ الرُّكُوعِ فَأَقِ٠ْ صُلْبَكَ فَإِنَّهُ لاَ صَلاَةَ لِ٠6.

Ahmad ibn Idris has narrated from Ahmad ibn Muhammad from al-Husayn ibn Sa‘id from al-Qasim ibn Muhammad from a man from abu Basir from who has said the following: “Abu ’Abd Allah (a.s.), has said, ‘When you stand up straight after Ruku‘ (bowing down on one’s knees), make your back (bones) stand straight (vertically), otherwise, one’s Salah (prayer) is not considered Salah (prayer).”’ ضعيف - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (5/125))