What was narrated by Muhammad bin Ahmad bin Yahya, from Ahmad bin Muhammad, from his father, from Ibn Abi Umayr, from Hammad bin ‘Uthman, from ‘Ubaydallah al-Halabi, who said: I asked Him عليه السلام about a man who, in a two-rak‘ah recommended prayer (‘nafilah’), forgot and did not sit between the two rak‘ahs, and then stood and performed the ‘ruku’ in the third. Imam عليه السلام said: "He should abandon that rak‘ah, sit down, recite the ‘tashahhud’, and give the ‘taslim’. Then he may begin a new prayer afterward."