4. My father and Muḥammad ibn Ḥasan both narrated to me from Ḥasan ibn Mattīl, from Ḥasan ibn ‘Ali Al-Kūfi, from ‘Ali ibn Ḥassān Al-Hāshimi, from ‘Abdil Raḥmān ibn Kuthayr – the servant of Abī Ja’far (Imam Bāqir ), who said: Abū ‘Abdillāh (Imam Sādiq ) said: Even if you go to Hajj every year of your life but do not go to the Ziyārah of Ḥusain ibn ‘Ali , you have abandoned one of your obligations toward Allāh and His Messenger ﷺ. Verily Allāh has made it mandatory (on the believers to fulfill) the right(s) of Ḥusain , and this (Ziyārah) is obligatory on every Muslim.