Ibrahim al-Mujab

Sayyid Ibrāhīm ibn Muḥammad ibn Mūsā al-Kāẓim (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.   He was the first Alid to settle in Karbala, where he died, and was buried in the Imam Husayn shrine.

al-Mujab has many descendants that are known today by various names. Al Faiz is the only line of his that remained in Karbala until this day, since he settled in 861. As for his other descendants, most of them emigrated to other cities and countries, some of them are known today as Al Qazwini, Al Hamami, Al Awadi, Al Sabziwari, and Al Khirsan. It is also reported, that the scholars al-Sharif al-Radi and al-Murtada are descendants of al-Mujab.

Biography
The date and place of al-Mujab's birth are unknown.

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.

al-Mujab became the first custodian of the Husayn and Abbas shrines.

It is reported that when al-Mujab entered the shrine of Husayn, he called, "Peace be upon you, O' father" to which he received an answer from the grave in a loud voice; "and with you be peace, O' my son"; and thus, became known as al-mujab, meaning "the answered one". 

One of his descendants recorded the incident in poetry, stating:

Death and resting place
Al-Mujab died in Karbala, in 912. He was buried in the grand courtyard of the Husayn shrine.

In 1804, al-Mujab's grave and rawaq (hallway) were added to the north west side of the Husayn shrine's precinct, under the supervision of the shrines' custodian at the time, Jawad Nasrallah, as part of an expansion of the Husayn shrine.

The zarih above his grave was renewed in 2013, by the Iranian association responsible for religious sites in Iraq.

Descendants
Ibrahim al-Mujab is the father of Muhammad al-Ha'iri, the ancestor of the Faiz Sayyids who are currently the custodians of Karbala. Along with the Faiz and al-Haeris, the Abu-Ragheef, an Iraqi tribe, also claim descent from Ibrahim.

Abu-Ragheef
The Abu-Ragheef are a Sayyid Husayni Musawi tribe in southern Iraq who claim descent from Ibrahim al-Mujab through his son Ahmad. Their lineage is as follows:
 * 1) Ali ibn Abi Talib
 * 2) Husayn ibn Ali
 * 3) al-Sajjad ibn Husayn
 * 4) Muhammad al-Baqir ibn Ali
 * 5) Jafar al-Sadiq ibn Muhammad
 * 6) Musa al-Kadhim ibn Jafar
 * 7) Muhammad al-Abid ibn Musa
 * 8) Ibrahim al-Mujab ibn Muhammad
 * 9) Sayyid Ahmad ibn Ibrahim
 * 10) Sayyid Najm al-Din Hasan ibn Ahmad
 * 11) Sayyid Idris ibn Hasan
 * 12) Sayyid Ja'far ibn Idris
 * 13) Sayyid Ibrahim ibn Ja'far
 * 14) Sayyid Hasan ibn Ibrahim
 * 15) Sayyid Radi al-Din ibn Hasan
 * 16) Sayyid Jamal al-Din ibn Radi al-Din
 * 17) Sayyid Zayn al-Din ibn Jamal al-Din
 * 18) Sayyid Amin al-Din ibn Zayn al-Din
 * 19) Sayyid Malir ibn Amin al-Din
 * 20) Sayyid Amin al-Din ibn Malir
 * 21) Sayyid Ali ibn Amin al-Din
 * 22) Sayyid Hamd ibn Ali
 * 23) Sayyid Muslih ibn Hamd
 * 24) Sayyid 'Ilm ibn Muslih
 * 25) Sayyid Hamoud ibn Ilm
 * 26) Sayyid Dawoud ibn Hamoud
 * 27) Sayyid Khalaf ibn Dawoud
 * 28) Sayyid Ibrahim ibn Khalaf
 * 29) Sayyid Dakheel ibn Ibrahim ibn Khalaf

Sayyid Dakheel is the ancestor of the Abu-Ragheef, and his grandson Sayyid Taher is their eponymous ancestor. The name Abu-Ragheef comes from an incident with Sayyid Taher. Taher's father, Sayyid Rahm, was in the Muntafiq liwā′ under the Muntafiq ruler, Prince Saadoun Nasser al-Ashkar