Al-Kāfi
Hadith 11067ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ ابْنِ فَضَّالٍ عَنِ ابْنِ بُكَيْرٍ عَمَّنْ رَوَاهُ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلام) فِي الرَّجُلِ يُصَلِّي وَالْمَرْأَةُ تُصَلِّي بِحِذَاهُ أَوْ إِلَى جَانِبِهِ فَقَالَ إِذَا كَانَ سُجُودُهَا مَعَ رُكُوعِهِ فَلاَ بَأْسَ.
7. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from ibn Faddal from ibn Bukayr from those who he has mentioned who has said the following: “I once asked abu ’Abd Allah (a.s.), about a woman who performs Salah (prayer) on the side or parallel with a man. He (the Imam) said, ‘If her Sujud (prostration) is with his Ruku‘ (bowing down on one’s knees), it is not harmful.’” (Ahadith 1-7 of this [chapter=Chapter are best explained by fatwa.)