1. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from al-Husayn ibn Sa‘id from al-Nadr ibn Suwayd from Hisham ibn Salim from Muhammad ibn Muslim who has said the following:

“I once said to abu ‘Abd Allah , "Ammar al-Sabatiy has narrated from you a Hadith.’ He (the Imam) asked, ‘What Hadith is it? 5 I then said, ‘He narrates that Sunnah is obligatory.’ He (the Imam) said, ‘Where does he go! Where does he go! I did not speak to him as such. I only said to him that when performing Salah (prayer) if one is attentive toward it, does not speak to one’s soul in it and does not make mistakes in it, Allah comes forward eagerly to what is performed eagerly. Perhaps one half is raised, one fourth, one third or one fifth is raised. We command to perform Sunnah only to complete what is missed of obligatory ones.’”