2. Through the chain of his narrators Hammad has narrated from Hariz from Zurarah who has said the following: “Abu Ja‘far عليه السلام, has said, ‘Of Salah (prayer) Allah has made ten Rak‘at obligatory on His servants. In such Salah (prayer) there are the recitations; thus, conjectures, mistakes in such Salah (prayer) are not acceptable. The Messenger of Allah added seven Rak‘ats in which conjectures, mistakes are dealt with according to certain rules, but there are no recitations in them.’”