Sayyid Ibrāhīm ibn Muḥammad ibn Mūsā al-Kāẓim (Arabic: إبْرَاهِيم بْنِ مُحَمَّد بْنِ مُوسَى الكَاظِمْ) also known as Ibrāhīm al-Mujāb and al-Ḍarīr al-Kūfī, was the son of Muḥammad al-ʿĀbid, and grandson of Mūsā al-Kāẓim, the seventh Twelver Shia Imam.
al-Mujab migrated from Kufa to Karbala in 861, after the Abbasid caliph al-Mutawakkil was killed at the hands of his son, al-Muntasir.
al-Muntasir was more merciful towards the Shias, and sympathetic with the Alids, allowing them to freely visit the grave of Husayn.
[15] Ibrahim al-Mujab is the father of Muhammad al-Ha'iri, the ancestor of the Faiz Sayyids who are currently the custodians of Karbala.
The Abu-Ragheef are a Sayyid Husayni Musawi tribe in southern Iraq who claim descent from Ibrahim al-Mujab through his son Ahmad.