Al-Kāfi - The Book of Prayer

Chapter: Performing Optional Salah (Prayer) on a Journey َّدُ بْنُ يَحْيَى عَنْ ٠َّدِ بْنِ الْحُسَيْنِ عَنْ صَفْوَانَ بْنِ يَحْيَى عَنْ يَعْقُوبَ بْنِ شُعَيْبٍ قَالَ سَأَلْتُ أَبَا عَبْدِ الله (عَلَيْهِ الْسَّلا٠) عَنِ الرَّجُلِ يُصَلِّي عَلَى رَاحِلَتِهِ قَالَ يُو٠َاءً يَجْعَلُ السُّجُودَ أَخْفَضَ ٠ِنَ الرُّكُوعِ قُلْتُ يُصَلِّي وَهُوَ يَ٠َاءً وَلْيَجْعَلِ السُّجُودَ أَخْفَضَ ٠7.

Muhammad ibn Yahya has narrated from Muhammad ibn al-Husayn from Safwan ibn Yahya from Ya’qub ibn Shu’ayb who has said the following: “I once asked abu ’Abd Allah (a.s.), about a man who performs Salah (prayer) on his stumper. He (the Imam) said, ‘He makes gestures for Sujud (prostrations) lower than the gesture for Ruku‘ (bowing down on one’s knees).’ I then asked, ‘Can he perform Salah (prayer) while walking?

He (the Imam) said, ‘Yes, but in the form of gestures and make the one for Sujud (prostrations) lower than that for RukuV” صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (5/393))