Mistake in Ruku‘

1. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from al-Husayn ibn Sa‘id from Fadalah ibn Ayyub from al-Husayn ibn ‘Uthman from ibn Muskan from abu Basir who has said the following: “I once asked abu ’Abd Allah عليه السلام, about a man who in a standing position doubts and does not know if he has performed Ruku‘ (bowing down on one’s knees) or not. He (the Imam) said, ‘He performs Ruku‘ and Sajdah (prostration).”’